How Much Light Does Pepper Need? PPFD & DLI
Thrives in steady warmth and well-draining soil; moderate during flowering.
- Peak PPFD: 600–900 µmol/m²/s
- Peak DLI: 35–52 mol/m²/d
- Air temperature: 24–29 °C
- Relative humidity: 50–65 %
- VPD target: 0.8–1.2 kPa
- Do not leave the substrate dry for more than 4 days
Targets per growth stage
| Stage | From day | PPFD | DLI | Photoperiod | pH | EC |
|---|---|---|---|---|---|---|
| Seedling | 0 | 100–250 µmol/m²/s | 6–14 mol/m²/d | 16 h | 5.8–6.3 | 0.8–1.2 |
| Vegetative | 21 | 400–600 µmol/m²/s | 23–35 mol/m²/d | 16 h | 5.8–6.3 | 1.5–2 |
| Flowering/fruiting | 60 | 600–900 µmol/m²/s | 35–52 mol/m²/d | 16 h | 5.8–6.5 | 2–2.5 |
Watering
Let the top layer dry out between waterings.