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Keystone Resistant Giant Pepper Seeds

Scientific name Capsicum annuum L.

About this variety

Keystone Resistant Giant pepper seeds grow into bushy plants reaching 25–30 in, bearing red fruit large bell fruit; exact dimensions not confirmed in the cited record. Heat category: Sweet. It is especially suited to large green bells, stuffing, roasting, grilling, salads, freezing, historic open-pollinated collections, and seed saving. Maturity is 70-79 Days.

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Alliance of Native Seedkeepers  |  SKU: PP26
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At a glance

The facts most gardeners need first

Open the full variety record
50 minimum seeds per packet
Gardener experience

Moderate

Germination difficulty

Moderate

Germination time

7–14 Days at 75–90 °F seed-zone soil temperature

  • Germination
    7–14 Daysa seed-zone soil temperature of 75–90 °F
  • Maturity
    70-79 DaysCounted from transplanting to the principal harvest stage under suitable conditions.
  • Sun
    Full sun
  • Support and spacing
    No support needed · space 18 in · rows 24 in
  • Growth habit
    Bush · Annual · 25–30 in tall
  • Best use
    Large green bells, stuffing, roasting, grilling, salads, freezing, historic open-pollinated collections, and seed saving
Secure checkout Details
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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 & Garden Calculators

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Use the garden-fit planner and soil calculator to turn the recorded growing facts into a practical plan.

Open Seed & Garden Calculators Uses this product’s recorded growing information. Local weather and garden conditions may vary.

Variety field guide

What to expect from Keystone Resistant Giant Pepper Seeds

Keystone Resistant Giant pepper seeds produce red sweet pepper fruit large bell fruit; exact dimensions not confirmed in the cited record on bushy plants reaching 25–30 in; maturity is 70-79 Days.

Open the complete descriptionHide the complete descriptionVariety traits, flavor, garden use, and the complete description

Keystone Resistant Giant pepper seeds grow into bushy plants reaching 25–30 in, bearing red fruit large bell fruit; exact dimensions not confirmed in the cited record. Heat category: Sweet. It is especially suited to large green bells, stuffing, roasting, grilling, salads, freezing, historic open-pollinated collections, and seed saving. Maturity is 70-79 Days.

Minimum seeds per packet: 50 seeds.

About Keystone Resistant Giant

Keystone Resistant Giant is a sweet pepper grown as Capsicum annuum L. Plants have a bushy habit and reach 25–30 in; support is listed as no added support. The principal mature or market color is Red, with fruit described as large bell fruit; exact dimensions not confirmed in the cited record. Reproductive classification: Open-Pollinated (OP). Maturity: 70-79 Days. Names associated with this variety include Keystone Resistant Giant Sweet Pepper, Pepper Seeds - Sweet - Keystone Giant.

  • Scientific name:Capsicum annuum L.
  • Life cycle:Annual
  • Planting season:Spring
  • Growth habit:Bush
  • Plant height:25–30 in
  • Sunlight:Full sun
  • Seed depth:1/4 in
  • Germination:7–14 Days at 75–90 °F
  • Spacing:18 in between plants; 24 in between rows
  • Soil:Loamy; pH 6.0–6.5
  • Water:Moderate
  • Support:No-Support
  • Reproductive type:Open-Pollinated (OP)
  • Fruit:Red; Large bell fruit; exact dimensions not confirmed in the cited record
  • Heat:Sweet; 0 SHU

History and seedkeeping context

North American cultivar records attribute Keystone Resistant Giant to the Corneli Seed Company and list it in a 1954 catalog. The recorded parentage combines California Wonder with a Hungarian cultivar, placing it within the history of mid-twentieth-century bell pepper breeding for fruit quality and disease resistance. The source describes a high percentage of fancy fruit, plants that stand up well, large fruit that remain green, and resistance to tobacco mosaic virus.

It compares the cultivar with Florida Giant. Keystone Resistant Giant should not be confused with Keystone Resistant III, a different later listing with its own 80-day maturity and 110 by 80 millimeter fruit. Transferring those numbers would make the page look precise while attaching another cultivar's data to this seed.

The available sources do not establish a named person’s tribal identity.

Fruit, flavor, and kitchen use

Harvest full-sized green bells for crisp fresh use, salads, stuffing, grilling, roasting, sautés, freezing, and sauces. If fruit is allowed to remain on the plant, it can progress toward ripe color and greater sweetness, but the 1954 record emphasizes large green fruit that holds its green stage. The cultivar is sweet and non-pungent. Its value is large bell shape, plant strength, and historical TMV resistance, not a hot-pepper flavor or a modern multi-disease package. Keystone Resistant Giant is especially useful for large green bells, stuffing, roasting, grilling, salads, freezing, historic open-pollinated collections, and seed saving. Flavor and eating quality are described as sweet bell pepper with no pungency; best known for large green fruit and sturdy plants. Heat classification: Sweet; listed range: 0 SHU. Pungency can shift with genetics, weather, water stress, and ripeness.

How to grow Keystone Resistant Giant

Start Keystone Resistant Giant indoors about 8 to 10 weeks before the last expected frost. Sow 1/4 in deep in a warm, evenly moist seed-starting mix; expect 7–14 Days near 75–90 °F. Provide strong light as soon as seedlings emerge, pot up before roots become crowded, and harden plants gradually before transplanting after nights are reliably warm.

Plant in full sun with loamy soil near pH 6.0–6.5. Space plants 18 in apart and rows 24 in apart. Maintain moderate moisture, mulch after the soil warms, and avoid excessive nitrogen. No added support is normally needed. Mature height is 25–30 in.

Season care

• Warmth matters most during germination; keep Keystone Resistant Giant seed warm without leaving the medium saturated. • Harden seedlings gradually and wait for warm nights before transplanting, because cold soil and wind can stall peppers for weeks. • No added support is normally needed; keep moisture even while fruit is setting. • Harvest at the color stage suited to the recipe, but leave fruit fully mature on selected plants when saving seed. • Use 70-79 Days as a planning range rather than a guaranteed calendar date; weather and transplant stress can shift first harvest.

Harvest and maturity

70-79 Days from transplant to first representative harvest; the same value is used in every description. Peppers can often be used at an immature green or transitional color, but fully ripe color is required for mature seed.

Saving seed

Peppers are largely self-pollinating but insect movement can produce crosses. To save Keystone Resistant Giant true to type, grow several healthy representative plants, isolate them from compatible pepper varieties or use blossom bags or cages, and remove clear off-types before flowering. Allow selected fruit to reach full biological color, handle hot fruit with gloves, remove the seed, dry it in a thin labeled layer until fully hard and dry, then store it cool, dark, and dry. Keep the harvest year, source, isolation method, and selection notes with the lot.

Common questions

When is Keystone Resistant Giant ready?

Plan around 70-79 Days. The listed range is a planning guide, and weather, transplant stress, and harvest stage can shift the actual date.

How long does germination take?

Expect 7–14 Days near 75–90 °F. Cooler media, excess water, old seed, or uneven moisture can delay emergence.

How large does it grow?

Expect about 25–30 in. Growth habit: Bush. Support: No-Support.

How is it used?

Large green bells, stuffing, roasting, grilling, salads, freezing, historic open-pollinated collections, and seed saving

Can I save seed?

Peppers are largely self-pollinating but insect movement can produce crosses.

Seed & Garden CalculatorsOpen 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 Keystone Resistant Giant Pepper Seeds fit your garden?

Check warmth, season length, growing space, harvest stage, and intended kitchen use. Start with the essentials, then open only the detail groups that matter to you.

Rules-based · no AI · optional answers

Add an optional ZIP code and planting date for a broad frost-window check.Use local forecasts and measured soil temperature for final planting decisions.
1Essential fitTiming, light, and space
2Temperature and exposureOptional microclimate detail
3Soil, drainage, and waterRoot-zone readiness
4Questions for this pepper seedCrop-specific decisions
5Seed-starting fit and patienceMatch the propagation work
Recorded product profileSome experience is helpfulModerate or temperature-sensitiveRead why
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

Laboratory report interpreter

Soil readiness for Keystone Resistant Giant Pepper Seeds

Capsicum annuum L.

Enter only the values your report provides. The result compares them with this crop’s recorded needs and keeps laboratory recommendations authoritative.

Core report valuesStart here
Advanced laboratory valuesOptional method-aware detail

Full growing record

Complete growing and seedkeeping record

Starting and plantingSeed preparation, sowing, germination, transplanting, spacing, and early establishment
Start Keystone Resistant Giant indoors about 8 to 10 weeks before the last expected frost. Sow 1/4 in deep in a warm, evenly moist seed-starting mix; expect 7–14 Days near 75–90 °F. Provide strong light as soon as seedlings emerge, pot up before roots become crowded, and harden plants gradually before transplanting after nights are reliably warm.

Plant in full sun with loamy soil near pH 6.0–6.5. Space plants 18 in apart and rows 24 in apart. Maintain moderate moisture, mulch after the soil warms, and avoid excessive nitrogen. No added support is normally needed. Mature height is 25–30 in.
Season-long growing guideWater, fertility, support, weather response, pollination, containers, and care through maturity
Start Keystone Resistant Giant indoors about 8 to 10 weeks before the last expected frost. Sow 1/4 in deep in a warm, evenly moist seed-starting mix; expect 7–14 Days near 75–90 °F. Provide strong light as soon as seedlings emerge, pot up before roots become crowded, and harden plants gradually before transplanting after nights are reliably warm.

Plant in full sun with loamy soil near pH 6.0–6.5. Space plants 18 in apart and rows 24 in apart. Maintain moderate moisture, mulch after the soil warms, and avoid excessive nitrogen. No added support is normally needed. Mature height is 25–30 in.
Harvest, storage, and usesRecognizing maturity, harvesting cleanly, handling, storage, and crop-appropriate uses

Harvest and storage

Keystone Resistant Giant is listed at 70-79 Days from transplanting to the principal harvest stage under suitable conditions. Harvest full-sized green bells for crisp fresh use, salads, stuffing, grilling, roasting, sautés, freezing, and sauces. If fruit is allowed to remain on the plant, it can progress toward ripe color and greater sweetness, but the 1954 record emphasizes large green fruit that holds its green stage. The cultivar is sweet and non-pungent. Its value is large bell shape, plant strength, and historical TMV resistance, not a hot-pepper flavor or a modern multi-disease package. Keystone Resistant Giant is especially useful for large green bells, stuffing, roasting, grilling, salads, freezing, historic open-pollinated collections, and seed saving. Flavor and eating quality are described as sweet bell pepper with no pungency; best known for large green fruit and sturdy plants. Heat classification: Sweet; listed range: 0 SHU. Pungency can shift with genetics, weather, water stress, and ripeness. Peppers are largely self-pollinating but insect movement can produce crosses. To save Keystone Resistant Giant true to type, grow several healthy representative plants, isolate them from compatible pepper varieties or use blossom bags or cages, and remove clear off-types before flowering. Allow selected fruit to reach full biological color, handle hot fruit with gloves, remove the seed, dry it in a thin labeled layer until fully hard and dry, then store it cool, dark, and dry. Keep the harvest year, source, isolation method, and selection notes with the lot.

Uses and garden roles

Harvest full-sized green bells for crisp fresh use, salads, stuffing, grilling, roasting, sautés, freezing, and sauces. If fruit is allowed to remain on the plant, it can progress toward ripe color and greater sweetness, but the 1954 record emphasizes large green fruit that holds its green stage. The cultivar is sweet and non-pungent. Its value is large bell shape, plant strength, and historical TMV resistance, not a hot-pepper flavor or a modern multi-disease package. Keystone Resistant Giant is especially useful for large green bells, stuffing, roasting, grilling, salads, freezing, historic open-pollinated collections, and seed saving. Flavor and eating quality are described as sweet bell pepper with no pungency; best known for large green fruit and sturdy plants. Heat classification: Sweet; listed range: 0 SHU. Pungency can shift with genetics, weather, water stress, and ripeness.
Seed savingSelection, pollination, isolation, full maturity, cleaning, drying, labeling, and storage
Peppers are largely self-pollinating but insect movement can produce crosses. To save Keystone Resistant Giant true to type, grow several healthy representative plants, isolate them from compatible pepper varieties or use blossom bags or cages, and remove clear off-types before flowering. Allow selected fruit to reach full biological color, handle hot fruit with gloves, remove the seed, dry it in a thin labeled layer until fully hard and dry, then store it cool, dark, and dry. Keep the harvest year, source, isolation method, and selection notes with the lot.
Pests, diseases, and troubleshootingPrevention, diagnosis, environmental disorders, common damage, and first-response checks
Keystone Resistant Giant can be affected by aphids, flea beetles, mites, hornworms, bacterial leaf spot, Phytophthora root and crown rot, sunscald, blossom-end rot, and fruit cracking. Use clean seed-starting supplies, rotate away from solanaceous crops, avoid overhead irrigation late in the day, maintain even soil moisture, and inspect the undersides of leaves. Similar symptoms can have different causes, so compare plants of the same age and use local Cooperative Extension or diagnostic support before applying a treatment.
Frequently asked questionsDecision-focused answers that supplement the detailed guides above
Frequently Asked Questions - Keystone Resistant Giant

When is Keystone Resistant Giant ready?
Plan around 70-79 Days. The listed range is a planning guide, and weather, transplant stress, and harvest stage can shift the actual date.

How long does germination take?
Expect 7–14 Days near 75–90 °F. Cooler media, excess water, old seed, or uneven moisture can delay emergence.

How large does it grow?
Expect about 25–30 in. Growth habit: Bush. Support: No-Support.

How is it used?
Large green bells, stuffing, roasting, grilling, salads, freezing, historic open-pollinated collections, and seed saving

Can I save seed?
Peppers are largely self-pollinating but insect movement can produce crosses.
History and provenanceBotanical identity, cultivar history, regional or cultural context, uncertainty, and source records

Scientific name: Capsicum annuum L.

Common name: Keystone Resistant Giant Sweet Pepper

Cultivar or variety: Keystone Resistant Giant

North American cultivar records attribute Keystone Resistant Giant to the Corneli Seed Company and list it in a 1954 catalog. The recorded parentage combines California Wonder with a Hungarian cultivar, placing it within the history of mid-twentieth-century bell pepper breeding for fruit quality and disease resistance. The source describes a high percentage of fancy fruit, plants that stand up well, large fruit that remain green, and resistance to tobacco mosaic virus. It compares the cultivar with Florida Giant. Keystone Resistant Giant should not be confused with Keystone Resistant III, a different later listing with its own 80-day maturity and 110 by 80 millimeter fruit. Transferring those numbers would make the page look precise while attaching another cultivar's data to this seed. The available sources do not establish a named person’s tribal identity.

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Customer experience

Reviews for Keystone Resistant Giant Pepper Seeds

Customer Reviews

Based on 4 reviews
75%
(3)
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25%
(1)
0%
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S
Samantha Vancourt (United States)

Great pepper…..done really well I’m my garden

Hi there! We're so glad to hear your peppers are thriving. Thanks for sharing your positive experience!

K
Ken (United States)

Wonderful selections at excellent prices. Had a question that was promptly answered to satisfaction. Order came ptomptly.

Recommended to another perdon that also placed an order.

I will be ordering again for certain.

.

Thank you, Arthur! We're glad you’re satisfied with our service and look forward to your next order.

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