How Much Light Does Radish Need? PPFD & DLI
Fast growing; don't let it dry out to avoid woody roots.
- Peak PPFD: 210–260 µmol/m²/s
- Peak DLI: 12–15 mol/m²/d
- Air temperature: 15–21 °C
- Relative humidity: 50–70 %
- VPD target: 0.7–1 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 | 6–7 | 0.8–1.2 |
| Mature | 28 | 210–260 µmol/m²/s | 12–15 mol/m²/d | 16 h | 6–7 | 1.2–1.6 |
Watering
Fast grower; do not let dry out to prevent woody roots.
Sources
- Currey, C.J. & Konjoian, P. (2023). How Increasing Light Improves Radish Yields. Greenhouse Grower (Iowa State University) — Supports: light targets, crop calendar
Values not covered by a source above are common growing practice, not taken from a primary source.