How Much Light Does Parsley Need? PPFD & DLI
Slow to germinate and to reach first harvest. In trials, warmth mattered more than light, with growth rising up to about 22 °C.
- Peak PPFD: 175–295 µmol/m²/s
- Peak DLI: 10–17 mol/m²/d
- Air temperature: 18–24 °C
- Relative humidity: 50–70 %
- VPD target: 0.7–1.1 kPa
- Do not leave the substrate dry for more than 3 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 | 60 | 175–295 µmol/m²/s | 10–17 mol/m²/d | 16 h | 5.8–6.4 | 1–2 |
Watering
Keep it moist but not waterlogged; the long taproot dislikes standing water.