Tomato Seeds - Indeterminate - Carbon Beefsteak
Dark, smoky-flavored beefsteak with complex sweetness and rich color.
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- Seeds: When properly stored, planted, and cared for, we guarantee reasonable germination and true-to-type growth for one year from purchase.
- Non-seed products: Free from defects in materials and workmanship for 30 days from shipment.
Excludes factors outside our control (extreme weather, pests, gardener error). If something’s off, contact us—we’ll make it right with a replacement, repair, or refund.
We do not sell seeds that are GMO or BE.
USDA “bioengineered (BE)” foods are those with detectable genetic material that was modified using in vitro recombinant DNA (rDNA) techniques, in ways not obtainable through conventional breeding or found in nature. The USDA’s National Bioengineered Food Disclosure Standard uses “bioengineered” as the nationwide labeling term.
- Detectable modified genetic material in the final food
- Created via in vitro rDNA techniques (e.g., gene transfer)
- Modifications not achievable through conventional breeding or nature
Description
The Carbon Tomato is an award-winning black beefsteak variety prized for its rich, smoky-sweet flavor and velvety texture. Maturing in 85–90 days, this indeterminate tomato produces large, 10–12 oz fruits with deep purple-brown skin and dark red flesh.
Its complex taste—sweet yet earthy with notes of wine and spice—makes it a standout for slicing, salads, and gourmet cooking. The meaty interior holds few seeds, making each bite dense and satisfying.
Plants are vigorous and heat-tolerant, performing best in full sun with consistent watering and fertile soil. Provide sturdy staking for its tall vines and heavy fruit set. Originally selected for its remarkable flavor depth, Carbon is often regarded as one of the finest-tasting dark heirlooms available.
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1. Choosing the Right Location
Light Requirements:
Tomatoes are sun-loving plants that require at least 6–8 hours of direct sunlight daily, though 8–10 hours is ideal for strong fruit set and flavor. Choose a site with full southern exposure whenever possible. Avoid shaded areas near trees, fences, or tall crops. Plants grown in partial sun may produce leggy growth and fewer fruits.
Soil Requirements:
Tomatoes thrive in well-drained, loamy soil enriched with organic matter. The optimal pH range is 6.0–6.8, though they tolerate slightly acidic conditions. Prepare beds ahead of time by incorporating aged compost, leaf mold, or well-rotted manure to improve structure, fertility, and microbial activity.
Avoid compacted or waterlogged soil, which restricts root growth.
Sandy soils warm faster and suit early crops; heavier soils retain moisture better in dry climates.
Rotate planting sites annually to prevent nutrient depletion and disease buildup.
Soil Preparation Tip:
Before sowing or transplanting, loosen the top 8–12 inches of soil and blend in 2–3 inches of organic compost. If needed, amend with bone meal for phosphorus and greensand or kelp meal for potassium to promote strong roots and flowering.
2. Starting Seeds Indoors
Timing:
Sow tomato seeds 6–8 weeks before the final expected frost date. Adjust timing to your region so that transplants are ready to go outside once the soil has warmed to at least 60°F (16°C) and nighttime temperatures remain above 50°F (10°C).
Containers and Medium:
Use clean trays or small pots filled with a sterile, fine-textured seed-starting mix. Avoid heavy garden soil, which compacts easily and harbors pathogens.
Sowing Depth:
Sow seeds ¼ inch deep, cover lightly, and mist gently to settle the soil. Maintain even moisture—damp but never soggy.
Germination Conditions:
Tomato seeds germinate best at 75–85°F (24–29°C). Use a heat mat if needed. Germination typically occurs within 5–10 days, though some heirloom varieties may take up to two weeks.
Light After Germination:
Once sprouts appear, move trays to a bright, warm location or under full-spectrum grow lights. Provide 14–16 hours of light per day to prevent leggy growth. Keep lights about 2–3 inches above the seedlings and raise them as plants grow.
3. Transplanting Seedlings
Thinning:
Once seedlings develop their first set of true leaves, thin weaker ones to ensure each has ample light and airflow. Handle gently by the leaves, not the stems.
Potting Up:
When seedlings reach 3–4 inches tall, transplant them into larger pots (3–4 inches wide). Bury the stems up to the first true leaves—tomatoes form new roots along buried stems, creating stronger plants.
Hardening Off:
7–10 days before transplanting outdoors, gradually acclimate plants to outdoor conditions:
Start with 1–2 hours of filtered sun the first day.
Increase exposure each day, reducing watering slightly to toughen the stems.
Avoid windy or cold days during hardening.
4. Planting Outdoors
Timing:
Transplant tomatoes after the danger of frost has passed and the soil is warm. Soil temperatures below 55°F (13°C) can stunt root growth. Early planting can be improved by warming the soil with black plastic or row covers two weeks prior to transplanting.
Planting Depth:
Plant deeply—bury the stem up to the first or second set of true leaves. This encourages a robust root system. In heavy clay soil, plant slightly shallower and mound soil around the base.
Spacing:
Determinate (bush) types: 18–24 inches apart
Indeterminate (vining) types: 24–36 inches apart
Rows: Space rows 30–42 inches apart for good airflow and access.
Proper spacing reduces humidity around leaves, helping prevent fungal disease and promoting even ripening.
Watering at Planting:
Water thoroughly after transplanting to settle soil around the roots. Use lukewarm, non-chlorinated water. Avoid overhead watering—direct it at the base to minimize leaf wetness and disease spread.
5. Watering and Moisture Management
Initial Watering:
Keep the soil evenly moist but never waterlogged during germination and early growth. Light, frequent watering helps young roots establish.
Ongoing Watering:
Once established, switch to deep, infrequent watering, encouraging roots to grow downward. Aim for about 1–1.5 inches of water per week, adjusting for weather and soil type. Water early in the day so foliage dries before evening.
Organic Tip:
Use rainwater whenever possible—its natural minerals and softness encourage better plant health compared to chlorinated tap water.
6. Temperature and Climate Conditions
Tomatoes favor warm conditions with daytime temperatures between 70–85°F (21–29°C) and nighttime temperatures above 55°F (13°C). Extended cold slows growth, while prolonged heat above 95°F (35°C) may reduce fruit set.
In hot climates, provide light afternoon shade using shade cloth or tall companion crops (basil, corn, or sunflowers). In cooler regions, use row covers or cloches to retain warmth during early growth. Maintain steady soil warmth for optimal root activity.
7. Fertility and Soil Feeding
Before planting, mix compost into the soil at a rate of about 1 part compost to 3 parts native soil. Tomatoes are moderate-to-heavy feeders but respond best to slow, balanced nutrition.
At planting time: mix a small handful of organic tomato fertilizer, bone meal, or worm castings into the hole.
Mid-season: side-dress with compost or dilute fish emulsion every 3–4 weeks.
Avoid over-fertilizing with nitrogen, which produces lush foliage but few fruits.
8. Early Support and Spacing Care
Install stakes, cages, or trellises at planting to avoid root disturbance later. Even determinate types benefit from light support to prevent fruit from touching the soil.
Maintain generous spacing to improve air circulation and light penetration—critical for disease prevention and even ripening.
9. Mulching and Moisture Control
After transplanting, apply 2–3 inches of organic mulch (straw, shredded leaves, or composted bark) around the base of each plant. Leave a small gap around the stem to prevent rot.
Mulch helps:
Retain soil moisture
Regulate temperature
Suppress weeds
Prevent soil from splashing onto leaves (reducing blight risk)
Refresh mulch as it decomposes throughout the season.
10. Organic Pest and Disease Prevention at Planting
Healthy soil and spacing are your best defense. Avoid synthetic chemicals—rely on prevention and natural balance.
Pests: Keep an eye out for aphids, hornworms, and whiteflies. Use neem oil, insecticidal soap, or hand-picking to control populations early.
Disease Prevention:
Water at the base to avoid wet leaves.
Provide good air flow between plants.
Rotate crops yearly; avoid planting tomatoes after peppers, potatoes, or eggplants.
Use compost teas (aerated or non-aerated) as a soil drench to boost microbial health.
Companion plants like basil, marigold, garlic, and borage help deter pests naturally while enhancing pollination and flavor.Choosing the Right Location:
Light Requirements: Tomato - Yellow Pear thrives in full sun. Select a location that receives at least 6-8 hours of direct sunlight daily.
Soil Requirements: Prefers well-drained, fertile soil with a pH of 6.0-6.8. Although adaptable to various soil types, it grows best in loamy soil enriched with organic matter.
Planting Seeds:
Timing: Start seeds indoors 6-8 weeks before the last expected frost date. Transplant seedlings outdoors after the last frost when the soil has warmed.
Sowing Depth: Sow seeds 1/4 inch deep in seed-starting mix. Cover lightly with soil and water gently.
Spacing: Thin seedlings to 18-24 inches apart when transplanting to allow adequate space for growth. Rows should be spaced about 24-36 inches apart.
Watering:
Initial Watering: Keep the soil consistently moist but not waterlogged until the seeds germinate, which typically takes 7-14 days.
Ongoing Watering: Once established, water deeply and regularly, especially during dry periods. Water the plants at the base to avoid wetting the foliage, which can lead to fungal diseases.
Temperature and Climate:
Preferred Temperature: Tomato - Yellow Pear grows best in warm temperatures ranging from 70-85°F (21-29°C). It can tolerate higher temperatures but may require more frequent watering during extreme heat.
Fertilization:
Feeding: Incorporate organic matter such as compost into the soil before planting. Use a balanced, all-purpose fertilizer at planting time and side-dress with compost or organic fertilizer mid-season.
Pruning and Thinning:
Thinning: Thin seedlings to prevent overcrowding, which can hinder growth and reduce air circulation.
Pruning: Prune suckers (the small shoots that grow between the stem and branches) to promote larger fruit production. Stake or cage plants to support the vines and improve air circulation.
Mulching:
Mulch Application: Apply a layer of organic mulch around the base of the plants to retain soil moisture, suppress weeds, and regulate soil temperature. Avoid piling mulch directly against the stems to prevent rot.
Pest and Disease Management:
Common Pests: While tomatoes can attract pests such as aphids, tomato hornworms, and whiteflies, using insecticidal soap or neem oil can help control these pests if necessary.
Diseases: Ensure good air circulation around the plants to prevent fungal diseases. Avoid overhead watering to minimize the risk of mildew and other fungal issues. Crop rotation and proper spacing can also help reduce disease incidence.
Watering
Provide 1–1½ inches of water per week, adjusting slightly during high heat or heavy fruiting.
Water deeply and steadily to develop strong roots and minimize cracking, which can affect the thin-skinned fruits of this dark heirloom.
Use drip irrigation or soaker hoses for consistent soil-level moisture while keeping leaves dry.
Avoid overhead watering, especially late in the day, to reduce fungal disease risk.
Mulch 2–3 inches deep with straw, shredded leaves, or compost once the soil warms to maintain even moisture and temperature.
Tip: Consistent watering preserves Carbon’s dense, meaty texture and prevents blotchy ripening common to dark-colored heirlooms.
Fertilizing
Before planting, incorporate 2–3 inches of compost or aged manure into the top 6 inches of soil.
Feed every 2–3 weeks during vegetative growth with a balanced organic fertilizer (10-10-10 or equivalent).
Once flowering begins, switch to a low-nitrogen, high-potassium blend (5-10-10) to support fruiting and improve flavor concentration.
Supplement monthly with calcium or kelp extract to prevent blossom end rot and enhance plant vigor.
Avoid overfertilizing—excess nitrogen leads to heavy foliage and delayed fruit ripening.
Tip: Carbon develops its signature smoky flavor when grown under steady, moderate fertility—avoid “overfeeding” for best results.
Weeding & Mulching
Keep planting areas weed-free to minimize competition and pest refuge.
Apply 2–4 inches of organic mulch (straw, compost, or shredded bark) to retain moisture, cool roots, and suppress weeds.
Weed gently around the base to protect shallow feeder roots.
Sun & Heat Management
Provide 6–8 hours of full sunlight daily to promote anthocyanin and lycopene pigment formation.
Ideal air temperature range: 75–90°F (24–32°C).
During extreme heat (>95°F / 35°C), use 30–40% shade cloth to protect flowers and reduce sunscald.
Ensure wide spacing to improve airflow and lower humidity.
Tip: Moderate heat and strong, consistent light produce Carbon’s deep purple-brown color and full-bodied flavor.
Spacing & Support
Space plants 30–36 inches apart in rows 36–48 inches apart.
As a vigorous indeterminate beefsteak, Carbon requires strong staking, trellising, or caging to support large fruits.
Train vines vertically and prune lightly to improve airflow and facilitate harvest.
Remove lower leaves below the first flower cluster to prevent soil splash and early blight.
Tip: Provide early structural support—Carbon fruits often exceed 1 lb each and can stress unreinforced branches.
Ecological Interplanting (Science-Based Companion Strategy)
Attract beneficial insects: Interplant with nectar-rich herbs such as dill, coriander, or sweet alyssum to attract lacewings, hoverflies, and parasitoid wasps that prey on aphids and thrips.
Enhance pollination: Grow flowering plants such as calendula, borage, or native asters nearby to maintain bee activity throughout the season.
Crop rotation: Avoid planting after other nightshades (peppers, potatoes, eggplants) for 2–3 years to reduce soilborne pathogens. Rotate with legumes or grains to restore soil health.
Soil ecology: Maintain mulch or off-season cover crops to boost microbial diversity and nutrient cycling.
Tip: Integrated Pest Management studies confirm that plant diversity and rotation outperform isolated “companion planting” for long-term pest suppression.
Container Growing
Grow in extra-large containers (minimum 25–30 gallons) with strong cage or trellis support.
Use high-quality organic potting mix enriched with compost and perlite for drainage.
Monitor moisture daily—large-fruited varieties dry out quickly in containers.
Feed every 10–14 days with compost tea or diluted organic tomato fertilizer for consistent growth.
Tip: Mulching the container soil helps stabilize moisture and prevent heat stress that leads to cracking.
Season Extension
Use row covers or tunnels early in the season to protect transplants and maintain warmth.
Preheat soil with black plastic mulch before transplanting in cooler climates.
As frost nears, remove new blossoms 4 weeks before frost to direct energy into ripening existing fruit.
Harvest nearly ripe tomatoes before frost—they’ll finish ripening indoors at 65–70°F (18–21°C).
Tip: Carbon’s dense flesh and rich pigment develop beautifully during indoor ripening—avoid refrigeration to preserve flavor.
Harvesting:
Harvest when fruits reach a deep mahogany-red tone with hints of violet or green undertones near the shoulders. Fully ripe fruits should feel slightly soft yet firm enough to handle without bruising.
Average fruit size ranges from 10 oz to 1 lb, though in fertile soil and proper trellising they may exceed that. Use pruning shears to cut fruits from the vine, leaving a short stem to avoid tearing and to extend shelf life.
Pick every two to three days once ripening begins. Avoid harvesting after heavy rain or overhead irrigation, as sudden moisture uptake can cause cracking. Fruits harvested at the “breaker” stage (just beginning to blush) will continue to ripen at room temperature and develop full flavor within several days.
Flavor & Culinary Use:
Carbon is famed among heirloom growers for its bold, balanced, and smoky-sweet profile—often considered one of the richest of all dark tomatoes. Its flavor is full-bodied and meaty with undertones of plum, wine, and earth, owing to its high anthocyanin content and balanced sugars.
Ideal for fresh slicing, sandwiches, and caprese salads, it maintains structure even when thinly sliced. When roasted or slow-cooked, it yields an exceptionally smooth sauce base with subtle sweetness and savory depth.
Its dense flesh and small seed cavities make it perfect for sauces, stews, or char-grilled preparations. Carbon’s deep flavor holds up against strong companions—smoked meats, aged cheeses, balsamic reductions, and fresh herbs.
Handling & Storage:
Store harvested fruits at 55 – 70 °F (13 – 21 °C) in a cool, shaded area with ample airflow. Avoid refrigeration, which diminishes its complex aroma and rich texture.
Lay in a single layer on padded or paper-lined trays; Carbon’s thin skin benefits from gentle handling. Under ideal conditions, fruits maintain their best eating quality for 5–6 days.
For markets or transport, pick slightly underripe (80–90 % colored) to preserve firmness—flavor will continue maturing postharvest.
Pruning & Support:
Carbon’s indeterminate vines grow vigorously and demand strong vertical support. Use tall cages, trellises, or stakes (7–8 ft), tying vines every 10–12 in with soft twine to prevent splitting under heavy fruit load.
Remove the lower leaves after the plant is established to reduce soil splash and early blight. Pinch suckers below the first flower cluster to encourage early fruit set and maintain open growth.
Moderate pruning improves airflow and reduces disease pressure, but maintain leaf coverage to protect fruits from direct midday sun.
Sun & Water Tips:
Provide 6–8 hours of full sun daily for optimum color and flavor concentration. In extremely hot climates, partial afternoon shade preserves the dark skin tone and prevents sunscald.
Water deeply once or twice weekly, maintaining even soil moisture to prevent cracking or blossom-end rot.
Apply organic mulch such as straw or compost once soil warms to stabilize moisture and temperature. Employ drip irrigation or soaker hoses to keep foliage dry and minimize fungal disease.
Seed Saving:
Select seed from the healthiest, most vigorous plants producing uniform dark fruits with characteristic smoky-sweet flavor. Allow fruits to ripen completely on the vine for mature seed development.
Scoop out the seeds and pulp into a small jar with water and ferment for 2–3 days, stirring daily to remove the gelatinous coating. Rinse thoroughly, then spread seeds thinly on a non-stick surface or fine mesh to dry for 7–10 days in shade with good airflow.
Store fully dried seeds in airtight containers in a cool, dark, and dry place. Properly cured Carbon Tomato seeds remain viable for 4–6 years. As an open-pollinated heirloom, they will remain true if isolated by 25–50 ft from other varieties.
Ecological & Pollinator Notes:
Carbon thrives in organically enriched, well-drained loam with moderate fertility and consistent moisture. Its open yellow blossoms attract native bumblebees and pollinators that improve fruit set through vibration pollination.
Interplant with flowering herbs such as basil, calendula, or thyme to attract beneficial insects and deter pests. Rotate tomatoes every two to three years with legumes or leafy greens to restore nitrogen and maintain soil vitality.
Avoid planting near peppers or potatoes, which share common pathogens. Provide 30 in (75 cm) spacing between plants to ensure airflow and sunlight penetration.
Culinary Pairings & Presentation Tips:
Carbon’s rich, smoky depth shines in both rustic and refined cuisine. Slice thickly for BLTs or caprese platters with burrata and olive oil. When roasted or grilled, its flavor intensifies—pair with rosemary, garlic, or smoked sea salt for gourmet preparations.
Use in slow-simmered sauces, paired with caramelized onions or roasted eggplant, for layered, savory complexity.
In market displays, its dusky burgundy skin contrasts beautifully against yellow or orange heirlooms—an heirloom of understated elegance, representing the depth and warmth of true tomato craftsmanship.
Insects & Mites
Tomato Hornworms (large green caterpillars, defoliation and fruit chewing)
Controls: Inspect plants at dawn or dusk when hornworms are most active. Handpick and destroy immediately. Encourage beneficial parasitic wasps (Cotesia congregata) for natural control. Apply Bacillus thuringiensis (Bt) late in the afternoon, ensuring full coverage. Keep nearby weeds and volunteer nightshades removed to reduce moth egg-laying.
Aphids (leaf curling, sticky honeydew, and stunted growth)
Controls: Use yellow sticky traps to detect infestations early. Spray neem oil or insecticidal soap every 5–7 days until populations subside. Attract beneficial insects such as lady beetles, lacewings, and hoverflies by planting dill, fennel, or yarrow nearby. Avoid overfertilization with nitrogen, which produces aphid-prone new growth.
Whiteflies (leaf yellowing, honeydew, and sooty mold)
Controls: Place yellow sticky traps near plants to monitor and capture adults. Apply neem oil or horticultural soap weekly during outbreaks. Introduce Encarsia formosa wasps for biological control. Prune lower leaves to increase airflow and remove weeds that shelter pests.
Spider Mites (fine webbing, stippling, and leaf bronzing)
Controls: Maintain consistent moisture and humidity levels to discourage mites. Rinse plants with water to remove mites and dust. Apply horticultural oil or insecticidal soap weekly until populations are controlled. Avoid hot, dry, and dusty environments.
Diseases
Early Blight (Alternaria solani) (dark concentric spots, yellowing, and leaf drop)
Controls: Rotate tomato crops every 2–3 years and avoid planting near peppers or potatoes. Apply copper-based fungicide preventively during humid periods. Water at soil level and remove infected leaves promptly. Mulch to prevent soil splash and fungal spread.
Fusarium Wilt (Fusarium oxysporum) (yellowing and wilting, one-sided leaf drop)
Controls: Solarize soil before planting to suppress fungal spores. Grow resistant cultivars when available. Ensure proper drainage and consistent watering. Remove infected plants immediately and disinfect tools and supports.
Septoria Leaf Spot (Septoria lycopersici) (small grayish leaf spots, premature defoliation)
Controls: Maintain mulch to reduce soil splash and apply copper fungicide during damp conditions. Prune lower leaves for better airflow and remove infected foliage immediately. Avoid overhead watering.
Physiological & Environmental Issues
Blossom End Rot (calcium deficiency, dark sunken fruit ends)
Controls: Maintain consistent soil moisture and mulch to regulate hydration. Test soil calcium levels and amend with lime or gypsum if necessary. Avoid nitrogen-heavy fertilization, which reduces calcium uptake.
Cracking (caused by uneven watering or rapid rainfall during ripening)
Controls: Maintain steady irrigation and avoid cycles of drought followed by heavy watering. Mulch deeply to stabilize soil moisture. Harvest fruit promptly during wet weather to prevent splitting.
Sunscald (white or leathery patches on exposed fruits)
Controls: Maintain healthy leaf cover for shading. Avoid over-pruning and provide temporary 20–30% shade during periods of intense sunlight.
Monitoring & Prevention — Quick Checklist
Inspect plants twice weekly for hornworms, aphids, and fungal issues.
Rotate crops annually to prevent soilborne disease accumulation.
Maintain mulch to conserve moisture and prevent soil splash.
Water deeply and directly at soil level to keep leaves dry.
Prune lower foliage for airflow while maintaining canopy shade for fruit.
Encourage beneficial insects with companion plant diversity.
Remove diseased foliage immediately and disinfect tools, cages, and stakes regularly.
Q: What type of tomato is Carbon Beefsteak?
Carbon Beefsteak is an indeterminate, open-pollinated tomato (Solanum lycopersicum) celebrated for its rich, smoky flavor and dark mahogany flesh. It produces large, 10–14 oz fruits with a dense, meaty texture and complex sweetness — often winning taste tests among black tomatoes. The variety traces its lineage to classic southern heirlooms known for exceptional depth of flavor.
Q: How long does Carbon Beefsteak take to mature?
Expect 80–85 days from transplant to harvest. The fruits ripen gradually, with deep red to brownish-purple tones signaling full flavor development.
Q: How long does it take for Carbon Beefsteak seeds to germinate?
Seeds germinate in 5–10 days at a consistent 75–90 °F (24–32 °C). Keep the seed-starting mix moist but never waterlogged.
Q: Does Carbon Beefsteak need special soil conditions?
Yes. It thrives in nutrient-rich, loamy soil with a pH of 6.0–6.8. Regular additions of compost or aged manure promote strong vines and deep flavor. Avoid high-nitrogen fertilizers, which can produce excessive foliage and fewer fruits.
Q: What spacing do Carbon Beefsteak tomatoes need?
Space plants 24–36 inches apart in rows 36–48 inches apart. Provide strong cages or trellising, as the vines are heavy producers.
Q: Do I need more than one plant for pollination?
No. Tomatoes are self-pollinating, though gentle airflow or pollinator visits help increase yield.
Q: Can I grow Carbon Beefsteak in containers?
Yes, though it requires a large container (minimum 15 gallons). Use rich potting soil, a sturdy stake, and water daily during high heat to prevent cracking.
Q: How tall do Carbon Beefsteak plants get?
Plants can reach 6–8 feet tall under ideal conditions. Pruning helps manage height and improves airflow.
Q: Why are my Carbon Beefsteak fruits cracking?
Cracking occurs from uneven watering or heavy rainfall after dry spells. Maintain even moisture and mulch the soil to regulate temperature and hydration.
Q: How should I harvest Carbon Beefsteak tomatoes?
Harvest when the fruits have turned a deep mahogany red with faint green shoulders. Ripe fruits yield slightly when pressed and release easily from the vine.
Q: How do I store Carbon Beefsteak tomatoes after harvest?
Keep at 55–70 °F (13–21 °C) in a single layer, stem side down. Avoid refrigeration, which damages flavor and texture.
Q: Are Carbon Beefsteak tomatoes good for cooking?
Yes. They excel in fresh slices, sauces, roasting, and grilling. Their dense, low-water flesh makes them ideal for rich sauces or smoky salsas.
Q: Are Carbon Beefsteak tomatoes heirloom?
Carbon is a modern open-pollinated variety bred for flavor from heirloom genetics. Though not a historical heirloom itself, it retains the complexity and sweetness of old southern types.
Q: Why are my Carbon Beefsteak fruits not ripening evenly?
Cool temperatures below 55 °F (13 °C) or excessive shade can slow ripening. Ensure full sunlight and steady warmth for consistent coloration.
Q: Can I save seeds from Carbon Beefsteak?
Yes. Carbon is open-pollinated, so saved seeds grow true to type. Choose ripe, disease-free fruits, ferment seeds for 2–3 days, rinse, and dry before storing.
From Seed Indoors (Spring)
From Plant (Spring)
Fall Planting
Expected Harvest
Is this a good fit for your garden?
Tomatoes are one of the greatest agricultural gifts of the Indigenous peoples of the Americas. Long before European contact, Indigenous farmers of western South America and Mesoamerica had already domesticated wild Solanum species, transforming them from small, sour berries into richly flavored, productive crops. Grown in raised fields and terraced gardens, tomatoes became part of a vibrant food system alongside maize, beans, and chili peppers — a living agricultural science that continues among Indigenous growers today.
When tomato seeds traveled across the Atlantic in the 1500s, they carried that legacy with them. European growers, first skeptical, gradually embraced the fruit, refining new forms in Italy, France, and Spain. Yet every variety, from the smallest cherry to the densest paste tomato, still descends from those early Indigenous selections.
The Carbon Tomato is a modern heirloom-type variety celebrated for its deep, smoky flavor and rich, dark coloration. Developed through open-pollinated selection in the United States, Carbon has repeatedly been honored in national tomato taste trials for its balance of sweetness, acidity, and earthy undertones. Its name reflects the dusky purple-brown tones of its fruit — colors produced by a blend of natural lycopene and anthocyanin pigments that harken back to the tomato’s Andean ancestry.
Though contemporary in breeding, Carbon carries forward the same principles that guided Indigenous farmers thousands of years ago: selection for resilience, taste, and beauty. Its flavor profile — complex, layered, and unforgettable — stands as proof that biodiversity and careful stewardship create excellence far beyond industrial uniformity.
In today’s gardens, the Carbon Beefsteak Tomato represents both rediscovery and refinement. Each dark, glistening fruit links modern seedkeepers to the deep agricultural lineage of the Americas, where the tomato’s story first began — in hands guided by care, curiosity, and reverence for the seed.
Healthy, well-adapted plants form the foundation of a strong seed line. Select only plants that are disease-free, vigorous, and true to type. Look for traits you wish to preserve—flavor, yield, fruit size, shape, color, and resilience to local conditions.
Mark these plants early in the season with colored ties or labels. Observe them through harvest, ensuring they maintain strong growth and fruit uniformity. Avoid saving seeds from hybrid varieties unless intentionally breeding for new traits, as hybrids will not breed true. Open-pollinated and heirloom tomatoes are ideal because they reproduce faithfully from one generation to the next.
When possible, save from at least six to ten plants per variety to maintain genetic diversity and avoid narrowing the gene pool.
2. Harvesting Seeds
Allow fruits to ripen fully on the vine until they develop deep color and softness. Overripe tomatoes produce the most mature, viable seeds.
Harvest carefully to avoid bruising.
Slice the fruit across its middle (not stem to blossom end) to expose the seed cavities.
Scoop out the seeds along with the gel (locular material) into a clean glass or ceramic container.
Label each container with the variety name immediately to prevent mix-ups.
3. Fermentation: Nature’s Cleaning Process
Tomato seeds are encased in a gelatinous coating that contains growth inhibitors. Fermentation naturally removes this layer while reducing seedborne pathogens in an organic, chemical-free way.
How to ferment seeds:
Add enough non-chlorinated or rainwater to the seed pulp to make it fluid.
Loosely cover the container with a breathable cloth or lid to allow airflow while keeping insects out.
Place in a warm, shaded area (70–80°F / 21–27°C).
Stir the mixture once or twice daily to encourage even fermentation.
Within 2–4 days, a thin film or mold will form on the surface—this is normal. The process is complete when most viable seeds have sunk to the bottom and the liquid no longer appears gelatinous.
Do not ferment longer than 4 days, as over-fermentation can reduce germination rates.
4. Cleaning Seeds (Organic Methods)
Once fermentation is complete:
Add fresh water, stir, and let the good seeds settle.
Carefully pour off the floating pulp, debris, and non-viable seeds.
Repeat until the water runs clear.
Strain the clean seeds through a fine mesh or cheesecloth to remove excess water.
Optional organic sanitization:
Instead of bleach, use one of the following gentle, natural alternatives:
Hydrogen peroxide rinse: Soak seeds in a 3% hydrogen peroxide solution for 5 minutes, then rinse thoroughly with clean water.
Apple cider vinegar solution: 1 part vinegar to 10 parts water for 1 minute, followed by thorough rinsing.
Chamomile tea soak: Use cooled, strong chamomile tea as a mild antifungal rinse before drying.
Each option helps reduce fungal spores while maintaining organic integrity.
5. Drying Seeds
Spread cleaned seeds in a single layer on a ceramic plate, mesh screen, or parchment paper. Avoid metal trays and paper towels, which can stick or react with the seeds.
Dry in a warm, shaded, well-ventilated area—never in direct sunlight or above 95°F (35°C). Stir daily to prevent clumping and ensure uniform drying.
Seeds are fully dry when they feel hard and brittle, breaking rather than bending under pressure. This usually takes 7–14 days depending on humidity.
If drying indoors in humid climates, a small fan or food dehydrator on the lowest setting (around 85°F / 29°C) can speed the process safely.
6. Storing Seeds
Proper storage protects your seed legacy:
Packaging: Store dry seeds in paper envelopes for short-term or airtight glass jars for long-term storage. You may add a small pouch of silica gel, baked rice, or powdered milk wrapped in paper as a natural desiccant.
Labeling: Write variety name, year saved, and any notable traits or growing conditions.
Environment: Keep seeds in a cool, dark, and dry place. Ideal storage temperatures are between 35–45°F (1–7°C).
Avoid frequent temperature changes or exposure to moisture. Under good storage, tomato seeds remain viable for 4–10 years, sometimes longer when kept refrigerated or frozen with humidity control.
7. Testing Seed Viability
Before planting, test seed viability to ensure quality:
Moisten a paper towel with clean, non-chlorinated water and place 10 seeds on it.
Fold and seal it inside a plastic bag or covered dish.
Keep in a warm (75–80°F / 24–27°C), dark area for 5–7 days.
Count how many have germinated.
8–10 sprouts: excellent viability
6–7 sprouts: acceptable, plant more heavily
Below 6 sprouts: refresh seed stock next season
8. Preventing Cross-Pollination
Tomatoes are self-pollinating, but pollinators like bees can occasionally cause crossing between varieties. To ensure purity:
Space varieties 10–25 feet apart if possible.
Use fine mesh blossom bags or lightweight fabric covers on selected flowers to ensure self-pollination only.
Collect seeds from multiple fruits and plants to preserve genetic diversity.
For seed-saving gardens, consider grouping similar types (like all cherries or all beefsteaks) in separate zones to minimize accidental crosses.
Isolation is especially important if you grow rare or heritage varieties that you want to keep true to their line.
9. Record Keeping and Documentation
Good records turn seed saving into a living science. Record:
Parent plant characteristics
Harvest date and location
Fermentation duration
Cleaning and drying methods
Storage conditions
Germination test results
Add personal notes on taste, disease resistance, and performance in your region. This information builds a reliable record of adaptation over time, forming the backbone of your seed stewardship work.
10. Organic Tips for Success
Never use chlorinated tap water; it can damage the natural microbial balance in fermentation.
Compost the leftover tomato pulp and skins—they enrich your soil for the next growing season.
Rotate crops yearly to prevent soilborne disease buildup.
Encourage beneficial insects such as native bees, hoverflies, and lady beetles to maintain ecological pollination balance.
Avoid synthetic fungicides or seed treatments that disrupt the natural seed microbiome.
Rejuvenate seed lots every few years by growing out and resaving fresh seed to maintain vitality.
Label immediately—unlabeled seed is lost history.
Culinary Uses
Tomatoes are among the most useful and diverse crops a grower can raise. Their natural harmony of sweetness, tang, and savory depth makes them a foundation of cuisines across the world. Nearly every culture has found ways to preserve, cook, or celebrate the tomato, and each type offers its own best use.
General Preparation Methods
Fresh Eating: Tomatoes can be sliced, diced, or eaten whole for a refreshing burst of flavor. Their acidity balances rich or oily dishes, and their juice adds natural umami depth to plant-based meals.
Cooking: Tomatoes transform when heat is applied—their sugars caramelize, their acidity mellows, and flavors deepen. Stewed or roasted tomatoes form the base for soups, sauces, chutneys, and gravies.
Preserving: Tomatoes are among the easiest crops to preserve. They can be sun-dried, oven-dried, canned, or frozen, retaining their bright taste for winter use.
Fermentation and Pickling: Sliced green or ripe tomatoes can be fermented with salt or lacto-cultured for tangy condiments rich in beneficial microbes.
Juices and Pastes: Pureed tomatoes yield smooth juice or concentrated paste for storage, sauces, and cooking.
Uses by Type
Each category of tomato lends itself best to certain culinary or preservation uses:
Slicer Tomatoes (Large and Beefsteak types):
Best for sandwiches, burgers, and fresh salads. Their large, juicy slices hold flavor and texture well. Excellent for thick sauces or roasted preparations.
Cherry and Grape Tomatoes:
Naturally sweet and quick to mature, these are perfect for snacking, salads, roasting, and skewers. They can be dried or blistered in oil for concentrated flavor.
Paste and Plum Tomatoes (Roma types):
Contain less water and more flesh, making them ideal for cooking down into sauces, ketchups, and pastes. Their texture holds well in slow-cooked dishes.
Canning or Processing Varieties:
Balanced between juice and flesh, these tomatoes are excellent for large-batch preserving. They peel easily, making them useful for stewed tomatoes, soups, and juice.
Heirloom Tomatoes:
Valued for their distinct colors, shapes, and complex flavors. Best enjoyed fresh, in salads, or as centerpiece ingredients where their taste and appearance shine.
Green or Specialty Tomatoes:
Unripe fruits or green varieties can be fried, pickled, or used in relishes. Their firm flesh and bright acidity make them unique for savory applications.
Nutritional Benefits
Tomatoes contribute richly to a healthy diet without overstating medicinal claims. They are naturally low in calories and high in hydration, providing essential nutrients that support overall well-being:
Vitamins: High in vitamin C, vitamin K, and vitamin A (as beta-carotene), which support immune function, bone strength, and visual health.
Minerals: Provide potassium, manganese, and trace amounts of iron and copper.
Phytonutrients: Contain lycopene, beta-carotene, and chlorogenic acid—antioxidants that help neutralize free radicals.
Dietary Fiber: Promotes digestion and balances blood sugar when eaten with other whole foods.
Cooking tomatoes increases lycopene availability, while fresh tomatoes retain higher vitamin C content, making both raw and cooked forms valuable parts of the diet.
Cultural and Practical Benefits
Tomatoes carry deep cultural significance. They connect growers and cooks through shared tradition, adaptation, and local flavor. Their ease of growth and abundance make them a cornerstone of seed sovereignty and community gardening.
Adaptability: Tomatoes thrive in containers, raised beds, and open fields, providing harvests even in limited space.
Economic and Community Value: A reliable crop for market growers and home seedkeepers alike. Fresh tomatoes, sauces, and preserved goods can all be sold or traded within local economies.
Seed Stewardship: Saving tomato seeds encourages local adaptation to soil and climate. Over time, these saved lines develop regional hardiness and flavor that reflect the land itself.
Teaching and Sharing: Tomatoes are often a beginner’s introduction to seed saving, fermentation, and seasonal cooking, bridging generations and passing on knowledge through practice.
Everyday Benefits and Kitchen Versatility
Tomatoes bring balance and brightness to nearly any dish. They pair naturally with herbs like basil, oregano, thyme, and parsley; with onions, garlic, and peppers; and with proteins ranging from beans to fish and poultry.
They also serve as a base for numerous cultural staples:
Italian: Pasta sauces, bruschetta, and margherita pizzas.
Mexican: Salsas, pico de gallo, and tomato-chile stews.
Indian: Tomato curries, chutneys, and masala gravies.
Mediterranean: Tomato-cucumber salads, stewed vegetables, and roasted spreads.
American and Southern: Fried green tomatoes, tomato gravy, and canning traditions.
Their diversity of form—round, pear-shaped, oblong, ribbed, or miniature—mirrors their diversity of use. Each variety, from a sun-warmed cherry to a dense Roma, brings its own balance of sweetness, acidity, and aroma to the plate.
Environmental and Garden Benefits
Beyond the kitchen, tomatoes contribute to ecological resilience:
Pollinator Attraction: Tomato blossoms draw bumblebees and native pollinators.
Companion Planting: Pair well with basil, marigold, garlic, and carrots to deter pests and enrich nearby crops.
Soil-Building Potential: Mulching tomato beds with compost and organic matter strengthens soil structure for future plantings.
Diversity Preservation: Growing multiple tomato types maintains genetic diversity, supporting the larger ecosystem of cultivated food plants.
Shipped from U.S.A.
Our seeds are grown and sourced from the US. They're then packed and shipped from Colerain NC.
Triple tested
We regularly test the quality and germination rate of our seeds. We're so confident that our seeds are backed by a 1 year warranty!
Soil Readiness
for Tomato Plants (Solanum lycopersicum)Where to get a soil test
Best option: your state’s Cooperative Extension soil testing lab.
Summary
Recommended Amendments (per 100 sq ft)
How to Use
- Mix P & K sources into top 3–6″ a week or two before planting.
- If pH is low, apply lime 3–4 weeks pre-plant (or fall/winter).
- Side-dress tomatoes with ~0.1 lb N / 100 sq ft at first fruit set; a light second side-dress after heavy early harvest is optional.
- Keep soil evenly moist and mulch to help prevent blossom-end rot (a Ca/moisture issue).
- Add 1–2″ finished compost yearly to build organic matter.
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