How Much Light Does Mint (spearmint) Need? PPFD & DLI
Grown from cuttings. Kept gaining mass up to ~19 mol/m²/d of light in trials, and did better at the cooler end of warm.
- Peak PPFD: 210–325 µmol/m²/s
- Peak DLI: 12–19 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 2 days
Targets per growth stage
| Stage | From day | PPFD | DLI | Photoperiod | pH | EC |
|---|---|---|---|---|---|---|
| Growth | 0 | 210–325 µmol/m²/s | 12–19 mol/m²/d | 16 h | 5.8–6.4 | 1–1.6 |
| Mature | 30 | 210–325 µmol/m²/s | 12–19 mol/m²/d | 16 h | 5.8–6.4 | 1.2–2 |
Watering
Likes moist soil and spreads fast; give it its own pot so it does not take over its neighbours.