How to Grow Long Red Chili

Long Red Chili

Capsicum annuum var. longum

vegetable

Long red chilis are slender, elongated peppers that mature from green to bright red, prized for their moderate heat level and versatile culinary applications. These tropical perennials, typically grown as annuals in temperate climates, produce abundantly when given proper warmth and sunlight. They're essential in cuisines worldwide, from Thai cooking to Mexican and Indian dishes.

Looking for a specific variety?

Thai Long Red Cayenne Red Hungarian Wax Fresno Guajillo Espelette

When should you plant Long Red Chili in your zone?

Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.

Get my Long Red Chili timeline →

Example Long Red Chili timeline · Pittsburgh, PA (Zone 6b)

Plant Long Red Chili
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
Harvest Long Red Chili
Around Jul 16

≈ 90 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Long Red Chili dates for your own zip code.

Growing Conditions

☀️

Sun: Full sun, 8-10 hours daily; more sun promotes faster fruiting

💧

Water: Consistent moisture; water deeply 1-2 inches per week. Keep soil evenly moist but never waterlogged. Reduce watering slightly once flowering begins to encourage fruit set.

📏

Spacing: 18 inches

📅

Days to maturity: 90-150 days from transplant to first red fruit

🌱

Planting depth: ¼ inch for seeds; transplant at soil line when 6-8 inches tall

Soil

Type: Well-draining loamy soil rich in organic matter

pH: 6.0-6.8

Amendments:

compost aged manure perlite or sand for drainage balanced fertilizer (10-10-10)

Growing Zones

Find your zone →

Thrives in zones 6-11; grow as annuals in zones 3-5 with early seeding indoors

3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b

Get my Long Red Chili timeline →

Growth Stages

Seedling (0-4 weeks)

3-4 weeks

Tiny sprouts emerge with cotyledons, developing true leaves. Plants remain small and delicate with thin stems.

Keep soil consistently moist but not waterlogged. Provide bright light (14-16 hours daily) to prevent leggy growth. Maintain temperature around 70-75°F. Start seeds indoors 8-10 weeks before last frost.

Vegetative Growth (4-12 weeks)

6-8 weeks

Plant develops multiple leaf pairs, branches emerge, and stem thickens. Rapid height and leaf expansion occurs. No flowers yet.

Harden off gradually before transplanting outdoors after last frost and soil reaches 60°F. Space plants 18 inches apart. Provide consistent fertilizer every 2-3 weeks with balanced NPK. Water deeply and mulch around base.

Flowering (8-14 weeks after transplant)

3-4 weeks

Small white or pale purple flowers appear at leaf axils. Plant may branch heavily. Flower clusters develop along stems.

Maintain consistent watering (soil should not dry out completely). Reduce nitrogen fertilizer; switch to higher phosphorus formula (5-10-10) to encourage flowering. Ensure adequate sunlight. Avoid over-fertilizing with nitrogen, which delays flowering.

Fruiting (14-18 weeks after transplant)

4-6 weeks

Peppers form after flower pollination, starting green and elongating. Color gradually shifts from green to red over 2-3 weeks. Plants may produce 20-40+ peppers.

Continue consistent watering; drought stress reduces fruit quality. Continue phosphorus-rich fertilizer every 2-3 weeks. Prune excessive foliage if shading fruit. Support heavy branches with stakes or cages.

Harvest & Production (16+ weeks)

6-12+ weeks depending on season length

Peppers reach full red color and firm texture. Plants continue producing new flowers and fruit throughout season if managed properly. Peak production occurs mid-to-late summer.

Harvest green peppers for immediate use, or leave on plant for full red ripening (which increases sweetness and antioxidants). Pick regularly to encourage continuous flowering. Water consistently. Continue light fertilization monthly. In frost zones, harvest all peppers before first frost.

Companion Planting

Plan your garden →

Plant with:

basil onion garlic spinach marigold carrot eggplant tomato

Avoid planting near:

fennel kohlrabi brassicas (in some traditions)

Common Pests

Spray with water stream to dislodge; use insecticidal soap or neem oil; introduce ladybugs or parasitic wasps
Increase humidity and mist foliage; apply neem oil or sulfur spray; ensure good air circulation
Remove affected leaves; use blue sticky traps; spray with neem oil or spinosad
Handpick larvae; encourage parasitic wasps; use Bt (Bacillus thuringiensis)
Use yellow sticky traps; spray with insecticidal soap; apply neem oil every 7-10 days
Maintain consistent soil moisture; ensure calcium availability; avoid excessive nitrogen fertilizer

Uses

🍳

Fresh and Cooked Dishes

Culinary

Long red chilies are widely used in curries, stir-fries, salsas, and hot sauces across Asian, Mexican, and Latin American cuisines. They add moderate heat and fruity flavor to soups, stews, and rice dishes. [source]

🍳

Dried and Ground Spices

Culinary

Dried long red chilies can be ground into chili powder, used in spice blends, or rehydrated for traditional sauces. They develop deeper, smokier flavors when properly dried. [source]

💊

Digestive and Anti-inflammatory Support

Medicinal

Capsaicin in chili peppers has been studied for pain relief, metabolic support, and anti-inflammatory properties. Traditional medicine uses them to aid digestion and stimulate circulation. [source]

🏠

Hot Sauces and Fermented Products

Household

Long red chilies are ideal for making fresh hot sauces, fermented chile pastes, and preserved condiments that last for months or years. They add both flavor and longevity to pantry staples. [source]

🦋

Hummingbird and Pollinator Attraction

Wildlife

The white or pale flowers attract hummingbirds, bees, and beneficial insects, supporting biodiversity in the garden while ensuring good fruit set. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Pick peppers when fully red and firm for mature flavor and maximum heat; can also harvest at green stage for milder taste and faster production of new fruit. Use sharp scissors or pruners to avoid damaging branches. Long red chilies can stay on plant for weeks once mature. Harvest all fruit before first frost in cooler zones. Peppers continue to ripen off the plant if picked at mature green stage and stored in a warm location.

Fun Facts

🌱 Long red chilies were domesticated in Mesoamerica over 6,000 years ago and were unknown in Asia until Spanish and Portuguese traders introduced them in the 15th-16th centuries; they're now essential to Thai, Indian, and Chinese cuisines.
🌱 The heat level of chilies is measured in Scoville Heat Units (SHU); long red chilies typically range from 25,000-70,000 SHU, making them moderately hot—far milder than habaneros (100,000-350,000 SHU) but hotter than bell peppers (0 SHU).
🌱 Chili plants are technically perennials and can live for 5+ years in warm climates; home gardeners sometimes overwinter mature plants indoors or move containers into greenhouses to extend production beyond typical annual seasons.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Annual Full Sun Mulch Perennial pH Pollination Transplant True Leaves

Shop Long Red Chili plants and related plants at Plant Addicts →

Join 30,000 gardeners planning their gardens with LizPlants.

Get your personalized Long Red Chili planting timeline

Tell us your zip code and we'll calculate exactly when to start Long Red Chili seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.

Get my Long Red Chili timeline →