How Much Light Does Cilantro (coriander) Need? PPFD & DLI
Grew 154 % more at ~18 than at ~7 mol/m²/d in a hydroponic trial. Bolts in heat, so keep it cool and harvest young.
- Peak PPFD: 210–310 µmol/m²/s
- Peak DLI: 12–18 mol/m²/d
- Air temperature: 16–24 °C
- Relative humidity: 50–70 %
- VPD target: 0.7–1.1 kPa
- Do not leave the substrate dry for more than 2 days
Targets per growth stage
| Stage | From day | PPFD | DLI | Photoperiod | pH | EC |
|---|---|---|---|---|---|---|
| Seedling | 0 | 100–200 µmol/m²/s | 6–12 mol/m²/d | 16 h | 5.8–6.4 | 1–1.4 |
| Mature | 28 | 210–310 µmol/m²/s | 12–18 mol/m²/d | 16 h | 5.8–6.4 | 1–2 |
Watering
Water little and often; a dry spell pushes it to flower and the leaves turn bitter.