Espelette
Capsicum annuum
Also known as: Piment d'Espelette, Ezpeletako biperra (Basque), Gorria
Quick facts
- Category
- fruiting
- Difficulty
- beginner
- Days to harvest
- 85 to 105 days
- Harvest type
- continuous production over weeks or months
- Spacing
- 50 cm between plants
Environment
- Temperature
- 18–28°C
- pH
- 6 to 6.8
- EC (hydroponic)
- 1.8 to 2.6 mS/cm
- Daily light
- 20 to 28 mol/m²/day (strict, will fail outside this range)
Climate and zones
- USDA zones
- 5 to 11 (winter low around -29°C or warmer)
- Frost tolerance
- frost sensitive (dies at first frost)
- Season
- warm (summer crops, frost-sensitive)
Viable growing environments:
- outdoor in growing season (annual)
- unheated greenhouse / hoop house
- heated greenhouse
- indoor (heated home)
- indoor hydroponics under grow lights
USDA zone bounds reflect outdoor year-round survival. Anywhere outside the bounded zone range, this crop still grows as an annual in the warm months (outdoor_seasonal), under cover (greenhouse), or indoors under lights.
Growing systems
Espelette works in:
- drip / Dutch buckets
- media bed (ebb and flow)
- soil bed
Growing media
The substrate the roots sit in. Choice depends on the system (clay pebbles don't fit NFT channels; rockwool isn't used in media beds) and the crop (espelette works in the media listed below).
| Medium | pH effect | Water retention | Bacterial surface |
|---|---|---|---|
| Expanded clay pebbles (LECA) | neutral / inert | low | high |
| Coco coir (Coconut coir) | slightly acidic | high | moderate |
| Perlite (Expanded volcanic glass) | neutral / inert | very low | low |
| Rockwool (Mineral wool) | alkaline until pre-soaked | very high | low |
| Soil-based mix (Potting soil) | varies by source | high | high |
Bacterial surface area matters for aquaponics: clay pebbles, lava rock, and pumice double as biofilter substrate. Low-surface media (rockwool, perlite, pea gravel) work in hydroponics but need a separate biofilter in aquaponics.
Nutrient demand by stage
NPK ratios are relative weights at each growth stage; the nutrient mix calculator scales them to absolute grams or ml. EC targets shift through the plant's life: seedlings need a much lighter solution than fruiting adults.
| Stage | N | P | K | EC target (mS/cm) |
|---|---|---|---|---|
| seedling | 2 | 1 | 1 | 1.2 |
| vegetative | 3 | 1 | 2 | 1.8 |
| flowering | 1 | 2 | 3 | 2.2 |
| fruiting | 1 | 2 | 3 | 2.4 |
Companion-growing notes
- Heavy uptake of potassium, calcium. Co-grown crops with the same demand will end up deficient even at "correct" EC. Plan around this in shared reservoirs.
Aquaponics suitability
Compatible with typical aquaponics nutrient profiles. Fish waste provides enough nitrogen for healthy growth; supplemental potassium, calcium, and iron may still be needed depending on fish stocking density.
Care notes
A specialty pepper for growers interested in regional European cuisines. EC 2.0-2.8 mS/cm. pH 5.8-6.5. Temperature: 18–28°C. Moderate to high light (DLI 18-25 mol/m2/day). Plants are medium-sized (50–80 cm). From transplant to ripe fruit: 85-100 days. Each plant produces 15-25 peppers. Harvest when fully red. For the traditional dried powder: string whole peppers through the stem with a needle and thread, hang in a warm, dry, well-ventilated area for 2-4 weeks until fully dry, then grind to powder. Alternatively, dehydrate at 55°C. The powder is used as a finishing spice: sprinkled on eggs, cheese, roasted vegetables, grilled meat, seafood, and Basque dishes like piperade. It's milder and more complex than generic paprika, with a warmth that builds gently. Growing your own provides access to a product that costs $15-40 per 100 g at specialty importers. Calcium supplementation during fruiting prevents blossom end rot. The seeds are available from European pepper seed specialists and some US suppliers.
Verified against: inao-france, rhs-uk, u-of-pau-france. Last reviewed 2026-05-15.