Can Rosemary and Sage share one grow tent?
One tent means one light, one timer and one climate. This is what Rosemary and Sage each need, and which differences moving the pots can fix.
The short answer
- Light: at their most demanding stage, no single light level suits both. Rosemary wants 240–395 µmol/m²/s, Sage 210–275. (Placement can fix this)
- Day length: Rosemary is usually grown at 14 h, Sage at 16 h. One light has one timer. (Same for the whole tent)
- Temperature: both are comfortable at 20–24 °C.
- Humidity: both are comfortable at 40–50 % RH.
Light, stage by stage
| Rosemary | PPFD | Sage | 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 | Mature | 210–275 µmol/m²/s | none |
| Mature | 240–395 µmol/m²/s | Seedling | 100–200 µmol/m²/s | none |
| Mature | 240–395 µmol/m²/s | Mature | 210–275 µmol/m²/s | none |
They share a light level in 1 of 4 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
Light is strongest under the centre of the fixture and weaker towards the edges. Put Rosemary under the centre and Sage towards an edge or the back of the tent.
If Rosemary still falls short, lift its pot on a box: closer to the light means more light, without changing anything for Sage.
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 Sage in the app and it shows where each pot gets its own light.