How Much Light Does Cucumber Need? PPFD & DLI
Fast-growing with high water and humidity requirements.
- Peak PPFD: 500–800 µmol/m²/s
- Peak DLI: 29–46 mol/m²/d
- Air temperature: 24–28 °C
- Relative humidity: 60–80 %
- VPD target: 0.6–1 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 | 5.5–6 | 1–1.2 |
| Vegetative | 14 | 300–500 µmol/m²/s | 17–29 mol/m²/d | 16 h | 5.5–6 | 1.8–2.2 |
| Flowering/fruiting | 35 | 500–800 µmol/m²/s | 29–46 mol/m²/d | 16 h | 5.5–6 | 2.2–2.8 |
Watering
Thirsty plant; requires frequent and regular watering.