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Mount Washington Arboretum · Baltimore, MD

Pepper

Chimayo Chile

Capsicum annuum

Annual

Care at a glance

☀️ LightFull sun (6–8 hrs)
💧 WaterRegular; 1 inch per week
📅 Days to maturity70–90
🌀 LifecycleAnnual
🗺 Hardiness zoneAnnual (frost-sensitive)
🌡 Temperature60°F – 90°F
↕ Height18–36"
↔ Spread18–24"
📏 Spacing18" apart

Soil

pH: 6.0–6.8  ·  Rich, warm, well-drained

Nutrients & Fertilizing

Balanced; high K at fruiting; avoid excess N

Baltimore Planting Windows

Based on last frost ~May 1, first frost ~Oct 31 (Zone 7a)
🪴 Transplant out (spring)May 15 – Jun 1

About this plant

Chimayo Chile is a landrace chile pepper cultivar from northern New Mexico, prized for its distinctive fruity-smoky flavor and moderate heat (2,500–8,000 Scoville units). It produces small, elongated red pods that are traditionally dried and ground into rich chile powder or left whole for cooking. Gardeners grow it for authentic Southwestern cuisine and because it adapts well to short-season and high-altitude climates.

Germination

Chimayo peppers need warm soil: sow seeds indoors 8–10 weeks before your last spring frost at a consistent 75–85°F. They germinate in 10–14 days under these conditions but can take 3–4 weeks in cooler soil, so bottom heat helps. Seeds need light to germinate, so press them into soil surface rather than covering them deeply. No pre-treatment is necessary, though some gardeners soak seeds in warm water for a few hours to speed germination.

How to plant

Start seeds indoors in trays or small pots filled with seed-starting mix. Transplant seedlings outdoors after the last frost date and soil has warmed to at least 60°F, spacing plants 18–24 inches apart in full sun. Peppers tolerate transplanting well; harden off seedlings gradually over a week before moving them outside. Choose a sheltered spot if possible, as Chimayo thrives in the high-altitude, low-humidity conditions of its native range but also does well in containers in cooler climates.

Growing tips

Water consistently but allow soil to dry slightly between waterings; overwatering causes root rot and reduces fruit quality. Fertilize every 3–4 weeks with a balanced fertilizer or one slightly higher in potassium to encourage flowering and fruiting. Chimayo peppers are relatively low-maintenance but benefit from mulch to retain moisture and keep roots cool. Watch for spider mites and aphids in hot, dry conditions; insecticidal soap or neem oil work well. If plants become leggy, pinch back growing tips early in the season to encourage bushiness.

Harvesting

Harvest peppers when they turn red and have developed their full, complex flavor; this usually occurs 70–90 days after transplanting, depending on conditions. For drying (the traditional use), pick fully ripe red pods and dry them whole on screens in a warm, well-ventilated space for 2–3 weeks until brittle. For fresh use, pick peppers at any stage from green to red. Dried Chimayo chiles keep for several months in airtight containers; grind dried pods into powder for authentic chile preparation, or rehydrate them for sauces.

Recipes using this plant

Fermented Herb Mix · by Grace McClintock
Another way to use whatever the garden is providing, but also create something that keeps for a long time. This is a fermented fresh herb salad dressing mix made in late summer and fall for use all winter. Stir into vinegar and olive oil for a quick dressing, blend into drained kefir for a creamy dip, or add to soups. Recipe from Monique Trahan via Grace.

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