Manitoba Tomato Seeds

Name: Manitoba Tomato Seeds
Brand: Alliance of Native Seedkeepers
SKU: TM43
Price: 1.5 USD
Availability: OutOfStock

Scientific name Solanum lycopersicum var. lycopersicum

About this variety

Manitoba Tomato Seeds produce red fruit in the slicer class on determinate plants. The crop is valued for balanced classic tomato flavor with sweetness, acidity, and juicy flesh. Fruit size is medium slicing fruit, commonly 4–10 oz. and the recorded maturity is 60-69 days.Manitoba is an early determinate heirloom tomato developed for short seasons and cool northern growing...

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Alliance Of Native Seedkeepers | SKU: TM43

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At a glance

The facts most gardeners need first

View the full variety record

25 minimum seeds per packet

Germination7–14 days · 75–90 °F
Maturity60-69 Days · 60-69 Days; generally measured from transplant under suitable conditions.
SunFull sun
Support & spacingStake · space 24 in · rows 36 in
Growth habitDeterminate · Annual · 31–36 in tall
Best useFresh slicing, salads, sandwiches, cooking, and all-purpose garden harvests.

Secure checkout Details

Triple-tested seed qualityRegular quality and germination checks support every packet.

We regularly test seed quality and germination as lots move through storage and packing. We stand behind the seed we send and want customers to contact us when a packet does not perform as reasonably expected.

1-year seed warrantyCoverage begins on the date of purchase.

When properly stored, planted, and cared for, we guarantee reasonable germination and true-to-type growth for one year from the date of purchase. Conditions outside our control—including extreme weather, pests, unsuitable storage, and gardener error—are excluded. Contact us when something is not right so we can review the situation and work toward a replacement, refund, or another fair resolution.

Non-GMO / BE seed policyWe do not buy or sell genetically engineered or bioengineered seed.

Every seed variety we sell is non-GMO.

USDA’s National Bioengineered Food Disclosure Standard defines bioengineered foods as containing detectable genetic material modified through in vitro recombinant DNA methods in ways not achievable through conventional breeding or found in nature.

Hybrid means parent lines were conventionally crossed; hybrid does not mean GMO.
Heirloom and open-pollinated describe how a variety is maintained and reproduced.
Organic certification is separate and is shown only when verified for the individual product.

Read how we define heirloom, hybrid, and GMO/BE seed · USDA BE Standard

Packed in Colerain, North CarolinaPrepared in our seed room for gardens across the country.

Seeds are packed and shipped from Colerain, North Carolina. Our packets use forestry-certified paper, and we use recyclable paper mailers where appropriate. AONSK is also a 1% for the Planet partner while continuing to reduce waste in packing and fulfillment.

Seed-starting profileDifficulty, preparation, reliability, and timing Open

Seed success profile

Gardener experience Some planning is helpful

Germination difficulty Straightforward with controlled warmth

Preparation before sowing: No stratification or scarification; use warm mix, even moisture, and strong light after emergence.
Germination speed: 7–14 days
Growing complexity: Determinate slicer crop requiring stake, even moisture, airflow, and repeated scouting.
Patience and timing: 60-69 Days

Is this seed a good match for your experience?

Expected germination: 7–14
Germination temperature: 75–90 °F
Stratification: None required
Scarification: None required
Pre-soaking: Not required
Light during germination: Cover lightly; provide strong light immediately after emergence.
Germination pattern: Reliable with fresh seed, controlled warmth, correct depth, and even moisture.
Transplant sensitivity: Transplant after hardening; avoid cold soil, frost, and severe root disturbance.
Starting method: Cataloged for indoor starting or transplanting; follow the hardening-off guidance.
Best chance of success: Control warmth and moisture, label the sowing date, and judge emergence across the full 7–14 day window before reseeding.

Planning window

Plan around 7–14at75–90 °F. Keep moisture, light, and preparation aligned with the sowing instructions below.

Slow germination is not automatically failed germination.

Maintain the listed temperature, moisture, light, and treatment conditions for the full expected window. Some seed lots emerge gradually rather than all at once.

1 Beginner-friendly 2 One extra step 3 Some experience helpful 4 Patient growers 5 Advanced propagation

Seed age, storage, sowing depth, moisture, temperature, light, local conditions, and aftercare can affect results. Last reviewed July 2026.

Browse AONSK seed-starting and garden guides

Garden tools

Need a plan for your space?

Open the garden-fit planner or soil calculator only when you need them.

Open garden tools Uses this product’s recorded growing information. Local weather and garden conditions may vary.

About this variety

What to expect from Manitoba Tomato Seeds

Manitoba Tomato Seeds produce red slicer tomatoes with balanced classic tomato flavor with sweetness, acidity, and juicy flesh. Medium slicing fruit, commonly 4–10 oz.

Read the complete product descriptionTraits, flavor, garden use, variety notes, and the full catalog record

Manitoba is an early determinate heirloom tomato developed for short seasons and cool northern growing conditions. Compact bush plants produce dependable harvests of smooth, medium-sized red tomatoes with firm, meaty flesh and balanced flavor for slicing, salads, canning, and sauces. Plants generally mature in about 60–65 days from transplant and are well suited to containers, raised beds, and smaller gardens. Start seeds indoors before the last frost, transplant into full sun after frost danger has passed, and provide light staking to support the concentrated crop.

Start Manitoba Tomato Seeds indoors about six to eight weeks before the expected final frost. Sow 1/4 in deep, keep the mix near 70–85°F, and provide strong light immediately after emergence. Transplant after frost danger has passed and nights are reliably mild. Space plants about 24 in; install stake at transplanting so roots are not disturbed later. A deep, even watering rhythm, mulch after the soil warms, and airflow through the canopy do more for fruit quality than a schedule built on shallow daily watering.

Grow Manitoba Tomato Seeds for fresh slicing, salads, sandwiches, cooking, and all-purpose garden harvests. Harvest by final color, gentle pressure, and the way fruit releases from the vine rather than by calendar alone. When heavy rain follows a dry period, pick mature fruit that has begun to color before it splits. Keep a written record of first bloom, first ripe fruit, cracking, flavor, disease pressure, and yield; memory becomes generous after the season is over, but a notebook remains honest.

Manitoba Tomato Seeds belongs to the long record of tomato selection that began with domestication in the Americas and continued through farmers, gardeners, public breeders, market growers, and seedkeepers. Where a precise breeder or family chain is not supported by a primary record, this page does not invent one. The variety is described through observable fruit, plant habit, use, and the records kept by people who continue to grow it.

Minimum Seed Count: 25 seeds

Additional variety overview

Manitoba Tomato Seeds are determinate slicer tomatoes producing red fruit. Medium slicing fruit, commonly 4–10 oz. The variety is best for fresh slicing, salads, sandwiches, cooking, and all-purpose garden harvests. Plan for stake, even soil moisture, full sun, and a harvest window of 60-69 days.

View all growing and care factsBotanical identity, timing, climate, soil, spacing, mature size, and crop-specific details

Plant identity

Minimum seed count 25 seeds

Seed product profile Tomato

Scientific name Solanum lycopersicum var. lycopersicum

Also known as Tomato, Tomato Seeds - Indeterminate - Manitoba Heirloom

Life cycle Annual

Botanical family Solanaceae

Reproductive type Open-Pollinated (OP)

Heritage qualifiers Non-GMO

Native to the United States Domesticated Plant

Domestication note Andean South America

Seed success and gardener experience

Gardener experience Some planning is helpfulLevel 3 of 5

Germination difficulty Straightforward with controlled warmthLevel 2 of 5

Preparation before sowing No stratification or scarification; use warm mix, even moisture, and strong light after emergence.

Stratification None required

Scarification None required

Pre-soaking Not required

Light during germination Cover lightly; provide strong light immediately after emergence.

Germination pattern Reliable with fresh seed, controlled warmth, correct depth, and even moisture.

Growing complexity Determinate slicer crop requiring stake, even moisture, airflow, and repeated scouting.

Transplant sensitivity Transplant after hardening; avoid cold soil, frost, and severe root disturbance.

First harvest or bloom 60-69 Days

Best chance of success Control warmth and moisture, label the sowing date, and judge emergence across the full 7–14 day window before reseeding.

Timing and climate

Days to maturity 60-69 Days

Germination 7–14

Germination temperature 75–90 °F

Planting season Spring

Bloom season Summer

Frost tolerance Tender

Sunlight Full sun

Water needs Moderate

Site, soil, and space

Soil type Loamy

Preferred soil pH 6.0–6.5

Seed depth 1/4 in

Plant spacing 24 in

Row spacing 36 in

Mature height 31–36 in

Growth habit Determinate

Support needed Stake

Suitable growing locations In-ground bed, Raised bed, Greenhouse, High Tunnel, Containers, Community garden

Crop-specific details

Best uses Fresh slicing, salads, sandwiches, cooking, and all-purpose garden harvests.

Flavor profile Balanced classic tomato flavor with sweetness, acidity, and juicy flesh.

Fruit size Medium slicing fruit, commonly 4–10 oz.

Container fit Suitable for a large container, generally 10–20 gallons, with drainage, a compact support, and consistent moisture.

Garden toolsOpen the garden-fit planner, planting-window questions, or soil calculator only when useful

Uses this product’s recorded growing information. Local weather, soil, and garden conditions may vary.

Garden-fit planning for this variety

Will Manitoba Tomato Seeds fit your garden?

Compare this tomato with your season, expected temperatures, sunlight, soil, drainage, water access, support, crop history, and harvest goals.

Add a ZIP code and planting plan for seasonal context. The planner will estimate a broad frost window and typical planting-period temperatures. It does not use live weather.

1 Location, timing, and temperatures

US ZIP code optional Used in your browser for a broad frost window and monthly temperature estimate. When are you planning? How will you begin? Tomato maturity is usually counted from transplant, not from dry seed. Expected daytime temperature optional

°F

Leave blank to use the broad ZIP/date estimate. Expected nighttime temperature optional

°F

Use a local forecast or your own microclimate knowledge when available. Measured soil temperature optional

°F

Measure at transplant depth; air and soil temperatures are not the same. Season protection available optional Protection can buffer cool starts, but ventilation and heat management still matter.

2 Light, site, and growing space

How much direct sun? What is the site exposure? Where will it grow?

3 Soil, drainage, and soil testing

Soil or growing mix How does the root zone drain? Do you have a recent soil test? Use the full soil test and amendment calculator below for nutrient planning.

4 Water, mulch, support, and crop history

Primary watering method How often can you check root-zone moisture? Will the soil be mulched? What support can you provide? What grew here recently?

5 Harvest goals and experience

What do you want from the harvest? What matters most? Your tomato-growing experience

6 Seed-starting fit and patience

Seed germination and growing the mature crop are different skills. These answers help the planner explain which part may need more experience.

Your seed-starting experience How much preparation are you comfortable doing? How long are you willing to wait for germination?

Recorded profile for this seedSome planning is helpful · Straightforward with controlled warmthReview the complete Seed Success Profile

Enter what you know about the garden. You can leave questions blank. The result will separate strong matches, planning needs, and reasons another tomato might be easier.

This planning tool uses broad regional frost windows, broad monthly temperature patterns, your own temperature entries when supplied, and the recorded product facts. It is not live weather or a guarantee. Local weather, microclimates, transplant health, soil conditions, and care can change the outcome.

Soil test, pH, drainage, and amendment calculator Have a laboratory soil report? Enter pH, nutrients, texture, bed size, and site observations here. Open soil tools

Recorded soil typeLoamy

Recorded pH range6.0–6.5

Water needsModerate

LightFull sun

Professional garden planning tool

Tomato Soil Test & Amendment Calculator

Translate a laboratory report into a bed-sized amendment estimate for Solanum lycopersicum.

Uses your lab values

Enter the numbers exactly as the laboratory reported them. Select the matching extractant and use the laboratory’s crop recommendation and every product label as the final authority. Field-soil rates do not apply to container mixes.

Need a laboratory soil test?Find your state Extension lab

Best option: your state’s Cooperative Extension soil testing lab.

Select your state:

Tip: Arid and alkaline-region laboratories may use Olsen phosphorus instead of Mehlich-3. Match the method printed on your report.

Report method and bed size

Choose the laboratory method and tell us how much ground you are amending.

Laboratory extractant Use the method printed on the report.

Garden bed area

sq ft

Used to scale the shopping-list amounts.

Soil texture Changes the size of the pH estimate.

Acidity and organic matter

Enter the pH and organic-matter percentage from the report.

Soil pH Uses this product’s listed pH range.

Organic matter

Many garden beds perform well around 4–8%.

Nutrients reported by the lab

Enter ppm values only when your report uses ppm for these nutrients.

Phosphorus

ppm

Target changes with extractant.

Potassium

ppm

Broad tomato planning range: 150–200 ppm.

Calcium

ppm

Interpret with pH, moisture, and lab guidance.

Magnesium

ppm

Interpret with pH and the laboratory recommendation.

The result scales broad educational estimates to the bed area. The laboratory recommendation and amendment label remain the final authority.

Enter at least one laboratory value above, then calculate.

Turn your soil report into a planting plan

Use the calculated pattern alongside the product label, your laboratory recommendation, and the way water moves through the bed. Read AONSK home and garden guides · Compare tomato varieties · Shop soil amendments · Shop fertilizers

Full growing record

Open only the section you need

How to start Manitoba Tomato Seeds from seedPreparation, timing, depth, germination, transplanting, spacing, and early care

Recorded germination plan

Expected germination: 7–14
Germination temperature: 75–90 °F

Complete sowing and planting guidance

Sow Manitoba Tomato Seeds 1/4 in deep in a sterile, fine-textured seed-starting mix about 6–8 weeks before the expected final spring frost. Keep the root zone near 70–85°F; emergence commonly begins in 7-14 Day. Cover the seed lightly, maintain even moisture without saturation, and provide bright light as soon as cotyledons appear. Pot seedlings up when roots hold the first plug together or plants have several true leaves. Harden gradually for 7–10 days, protecting young plants from sudden wind, bright sun, and cold soil. Transplant only after frost danger has passed. Set plants about 24 in apart and secure the final support at planting.

How to grow this specific varietyLight, water, fertility, support, spacing, airflow, crop behavior, and season-long care

Variety-specific growing notes

Manitoba should be evaluated as a complete crop: emergence, transplant recovery, canopy health, flower set, fruit quality, harvest labor, and response to local disease pressure. Determinate growth and slicer fruit determine the support and harvest pattern. Maintain an open but shaded canopy, avoid repeated shallow watering, and do not push soft growth with excess nitrogen. In humid seasons, remove lower spotted leaves early, keep fruit off the ground, and record whether symptoms move upward despite improved culture.

Complete growing guide

Grow Manitoba Tomato Seeds in full sun, ideally eight or more direct hours. Use well-drained soil with compost and follow a soil test rather than feeding by habit. Water deeply enough to moisten the active root zone, then wait for the upper soil to begin drying before watering again. A two- to three-inch mulch layer, kept away from the stem, moderates moisture and reduces soil splash. The plant habit is determinate, so support and pruning should match that architecture. Determinate plants usually need only light cleanup and a cage or short stake; indeterminate plants need a strong cage, trellis, or stakes and may be trained to selected stems. Preserve enough foliage to shade fruit, especially in hot summers. Remove leaves touching the soil, scout twice each week, and rotate away from tomatoes, peppers, eggplants, and potatoes when garden space allows.

Practical field and garden tips

Record sowing date, emergence, transplant date, first bloom, first ripe fruit, and the weather around major problems. That record turns one season into evidence for the next. Do not mistake rank growth for plant health: deep-green, overfed vines can delay fruiting. Side-dress only after fruit set or when a soil test and plant response justify it. In humid Mid-Atlantic gardens, canopy airflow, base watering, mulch, and sanitation must work together. In extreme heat, afternoon shade cloth can reduce sunscald and flower loss without turning the bed into deep shade.

Harvest, storage, uses, and benefitsWhen and how to harvest, ways to use the crop, storage, culinary value, habitat value, and garden roles

Harvest and use notes

Harvest Manitoba Tomato Seeds when fruit reaches its mature color and yields slightly to gentle pressure. Use it for fresh slicing, salads, sandwiches, cooking, and all-purpose garden harvests. For seed saving, select several healthy true-to-type plants and ferment seed from fully ripe fruit before drying and labeling it.

Uses and benefits

Manitoba Tomato Seeds are best suited to fresh slicing, salads, sandwiches, cooking, and all-purpose garden harvests. The expected flavor is balanced classic tomato flavor with sweetness, acidity, and juicy flesh. For fresh eating, harvest fully colored fruit that yields slightly to pressure. For sauce or roasting, allow fruit to reach full color and use promptly. Tomatoes intended for canning must be processed with a current tested recipe from the National Center for Home Food Preservation or another authoritative source; variety name alone does not determine safe acidity.

Seed saving and carrying the variety forwardPollination, isolation, selection, harvest, cleaning, drying, and storage

Manitoba Tomato Seeds are open-pollinated and can be saved from healthy, true-to-type plants. Tomatoes are primarily self-pollinating, though occasional insect crossing can occur. For higher purity, separate varieties, bag flower clusters, or save from multiple correctly formed fruits on several plants. Squeeze seed and gel from fully ripe fruit into a labeled cup. Ferment for roughly 2–4 days, stirring daily, until the gel breaks down. Add water, pour off floating pulp, and repeat until clean seed settles. Dry the washed seed in a thin layer on a labeled nonporous surface for at least one to two weeks. Store only completely dry seed in a cool, dark, dry place. Do not save seed from diseased plants.

Problems and answersPests, diseases, troubleshooting, practical response, and product-specific questions

Variety troubleshooting summary

Leaves curling upward without mosaic or severe distortion often reflect heat, pruning, or moisture stress. Yellowing from the bottom with spots requires closer disease inspection. Cracking usually follows a rapid moisture change. Blossom-end rot reflects disrupted calcium movement during fruit development. Flower drop may follow heat, cold, drought, excess nitrogen, or high humidity. When symptoms do not fit a clear cultural problem, photograph the whole plant, both leaf surfaces, stem, fruit, and roots, then consult a local Extension diagnostic resource.

Complete pest and problem guide

Common tomato problems include early blight, Septoria leaf spot, bacterial spotting, wilt diseases, root-knot nematodes, hornworms, aphids, flea beetles, blossom drop, cracking, blossom-end rot, catfacing, and sunscald. Begin with diagnosis. Concentric target-like lesions on older leaves suggest early blight; many small tan or gray spots with dark margins may suggest Septoria; rapid water-soaked collapse in cool wet weather requires urgent late-blight attention. Reduce risk with rotation, clean transplants, mulch, base watering, airflow, tool sanitation, and removal of severely affected tissue. Blossom-end rot is usually a calcium-delivery disorder driven by root stress and uneven moisture, not proof that the soil simply lacks calcium.

Questions gardeners ask

Q: How long do Manitoba Tomato Seeds take to germinate?
A: Usually 7-14 Day near 70–85°F, though seed age, depth, moisture, and temperature affect the window.

Q: Is this variety determinate or indeterminate?
A: Determinate. Match support and pruning to that habit.

Q: Can it grow in a container?
A: Suitable for a large container, generally 10–20 gallons, with drainage, a compact support, and consistent moisture.

Q: Why are flowers falling without making fruit?
A: Heat, cold nights, drought, excess nitrogen, humidity, and weak pollen release can all contribute. Stabilize moisture and avoid heavy feeding before assuming a disease.

Q: Can I save seed?
A: Yes. Ferment seed from healthy, fully ripe, true-to-type fruit and dry it completely before storage.

History, provenance, and cultural contextWhat is documented, what is reported, what remains uncertain, and how the variety reached gardeners

Scientific name: Solanum lycopersicum var. lycopersicum

Provenance summary

Plant and variety history

Source and record notes

https://content.ces.ncsu.edu/growing-tomatoes-in-the-home-garden
https://extension.umn.edu/planting-and-growing-guides/saving-vegetable-seeds
https://ipm.ucanr.edu/home-and-landscape/tomato/

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