Can Rosemary and Leafy greens (lettuce, herbs) share one grow tent?
One tent means one light, one timer and one climate. This is what Rosemary and Leafy greens (lettuce, herbs) each need, and which differences moving the pots can fix.
The short answer
- Light: at their most demanding stage, one light level suits both — 240–295 µmol/m²/s.
- Day length: Rosemary is usually grown at 14 h, Leafy greens (lettuce, herbs) at 16 h. One light has one timer. (Same for the whole tent)
- Temperature: both are comfortable at 18–22 °C.
- Humidity: Rosemary wants 40–50 % RH, Leafy greens (lettuce, herbs) 50–70 %. No range suits both. (Same for the whole tent)
Light, stage by stage
| Rosemary | PPFD | Leafy greens (lettuce, herbs) | PPFD | Suits both |
|---|---|---|---|---|
| Seedling | 100–200 µmol/m²/s | Seedling | 100–200 µmol/m²/s | 100–200 µmol/m²/s |
| Seedling | 100–200 µmol/m²/s | Growth | 175–260 µmol/m²/s | none |
| Seedling | 100–200 µmol/m²/s | Mature | 210–295 µmol/m²/s | none |
| Mature | 240–395 µmol/m²/s | Seedling | 100–200 µmol/m²/s | none |
| Mature | 240–395 µmol/m²/s | Growth | 175–260 µmol/m²/s | none |
| Mature | 240–395 µmol/m²/s | Mature | 210–295 µmol/m²/s | 240–295 µmol/m²/s |
They share a light level in 2 of 6 stage combinations.
For plants whose target is daily light (DLI), the PPFD shown is at their usual day length. On a different timer it changes.
How to make it work
Keep both canopies at a similar height and set the light for 240–295 µmol/m²/s.
Day length, temperature and humidity are the same for every pot in the tent, and moving the pots does not change them. Where the two differ, any setting is a compromise for one of them.
Where exactly, in your tent?
That depends on your tent, your fixture and how high it hangs. Add Rosemary and Leafy greens (lettuce, herbs) in the app and it shows where each pot gets its own light.