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How to Grow Pasilla de Oaxaca

Pasilla de Oaxaca

Capsicum annuum var. pasilla

vegetable

The Pasilla de Oaxaca is a distinctive Mexican chili pepper known for its long, narrow, wrinkled dark brown to nearly black pods when mature. This heirloom variety produces smoky-flavored peppers prized in traditional Oaxacan cuisine, particularly for moles and salsas. The plant is moderately productive and relatively easy to grow in warm climates.

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Example Pasilla de Oaxaca timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Pasilla de Oaxaca

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Pasilla de Oaxaca

    Around Jul 16

    ≈ 90 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Pasilla de Oaxaca dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 8+ hours daily for optimal flowering and pod development
💧
Water: Consistent, deep watering 1-2 inches per week; allow soil to dry slightly between waterings. Increase frequency during hot periods. Avoid overhead watering to prevent disease.
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Spacing: 18 inches
📅
Days to maturity: 90-120 days from transplant to first mature fruit
🌱
Planting depth: 0.25 inches for seeds; transplant at soil line when 3-4 inches tall

Soil

Type: Well-draining loamy soil rich in organic matter
pH: 6.0-6.8
Amendments:
Compost Aged manure Perlite or coarse sand for drainage Balanced fertilizer (5-5-5 or similar)

Growing Zones

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Thrives in zones 9b-11, can be grown as an annual in zones 7-9 with season extension

9b 10a 10b 11a 11b

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Growth Stages

1

Seedling

4-6 weeks

Small plants with 2-4 true leaves, tender and delicate

Keep soil consistently moist but not waterlogged. Provide 14-16 hours of bright light daily under grow lights. Maintain temperature 70-80°F. Begin gentle air circulation to strengthen stems.

2

Vegetative Growth

3-4 weeks after transplanting

Plant develops bushy foliage with multiple branching stems, no flowers yet

Harden off transplants over 7-10 days before planting outdoors. Space properly for air circulation. Maintain consistent moisture and regular fertilization every 2-3 weeks with balanced or slightly nitrogen-higher fertilizer.

3

Flowering

4-6 weeks

White or pale lavender flowers appear in leaf axils; plant reaches mature height and canopy

Switch to lower-nitrogen, higher-phosphorus fertilizer (e.g., 5-10-10) to promote fruit set. Ensure consistent watering and full sun. Gently shake plants in morning to aid pollination.

4

Fruiting & Development

6-8 weeks

Young green pods form and elongate; gradually darken to brown as they mature

Maintain consistent moisture to prevent blossom end rot and cracking. Continue phosphorus-rich fertilizer every 2-3 weeks. Remove lower leaves if needed for air circulation. Support heavy fruit clusters with stakes or cages.

5

Mature/Harvest-Ready

Ongoing, August-October in most regions

Pods reach full length (6-8 inches), develop characteristic wrinkled texture, and turn dark brown to nearly black

Peppers can be harvested green for milder flavor or allowed to fully mature for deeper, smoky flavor. Pick regularly to encourage continued production. In cooler zones, harvest before first frost.

Companion Planting

Plan your garden →

Plant with:

Basil Onions Garlic Carrots Parsley Marigolds Nasturtiums Cilantro

Avoid planting near:

Fennel Kohlrabi Brassicas (cabbage, broccoli, cauliflower) Other nightshades in very close proximity (tomatoes, eggplant) to prevent shared pests

Common Pests

  • Spray with water to dislodge; use insecticidal soap or neem oil. Encourage beneficial insects like ladybugs and parasitic wasps.

  • Increase humidity and airflow. Spray with water mist. Use miticide or neem oil if severe. Remove heavily infested leaves.

  • Remove affected flowers and leaves. Use reflective mulch to deter. Apply spinosad or neem oil. Encourage natural predators.

  • Use yellow sticky traps. Spray with insecticidal soap, neem oil, or horticultural oil. Encourage parasitic wasps.

  • Remove infested fruit immediately and destroy. Use pheromone traps. Apply spinosad or pyrethrin sprays. Scout regularly.

  • Ensure good air circulation and avoid overhead watering. Remove affected leaves and fruit. Use copper fungicide. Plant resistant varieties when possible.

  • Ensure excellent drainage. Avoid soil splash. Remove infected plants. Rotate crops. Use resistant rootstocks if available.

Uses

🍳

Mole & Traditional Oaxacan Cuisine

Culinary

Pasilla de Oaxaca is iconic in Oaxacan mole negro, mole rojo, and other traditional Mexican sauces. When fully mature, the dried peppers develop a complex smoky, fruity, and slightly chocolatey flavor that forms the backbone of these intricate spice blends. [source]

🍳

Fresh & Dried Salsas

Culinary

Both green and mature peppers work in fresh salsas, while dried mature peppers are rehydrated for cooked salsas, enchilada sauces, and chile pastes. The smoky depth adds complexity to many Mexican dishes. [source]

🍳

Seasoning & Spice Blends

Culinary

Dried and ground Pasilla de Oaxaca peppers can be used as a finishing spice for soups, stews, grilled meats, and vegetables. The powder adds smoky heat without overwhelming spice. [source]

🏠

Drying & Storage

Household

Fully mature peppers dry exceptionally well and store for many months in a cool, dark place. Dried peppers can be strung together in traditional ristras for both decoration and preservation. [source]

🦋

Pollinator & Bird Support

Wildlife

The flowers attract bees and hummingbirds, while ripe peppers can feed wild birds and small mammals. Growing Pasilla de Oaxaca supports local pollinator populations. [source]

Harvest Tips

Pasilla de Oaxaca peppers are traditionally harvested when fully mature and dark brown for use in authentic Oaxacan mole and other traditional dishes, which typically takes 120+ days. They can be harvested green (60-70 days) for a fresher, milder flavor, but waiting for full maturity develops the characteristic smoky, complex flavor. Use pruning shears or a knife to cut peppers from the plant to avoid damaging branches. Handle carefully as the skin wrinkles easily. Peppers will continue to ripen after picking if placed on a warm windowsill.

Fun Facts

  • 🌱 The Pasilla de Oaxaca is a distinct heirloom variety specific to the Oaxaca region of Mexico and is protected by traditional knowledge; it differs from other pasilla peppers grown elsewhere, making it a true regional treasure.
  • 🌱 These peppers develop their signature wrinkled texture and deep mahogany-to-black color only when fully mature, which is why Oaxacan cooks wait for complete ripeness—the wrinkles indicate peak flavor development.
  • 🌱 In Mexico, dried Pasilla de Oaxaca peppers are sometimes called 'pasilla negra' and are considered essential to authentic mole negro, with some families jealously guarding their own seed lines passed down through generations.

Gardening Terms

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

Full Sun Heirloom pH Pollination Transplant True Leaves
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