Can Pepper and Cilantro (coriander) share one grow tent?
One tent means one light, one timer and one climate. This is what Pepper and Cilantro (coriander) 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. Pepper wants 350–900 µmol/m²/s, Cilantro (coriander) 210–310. (Placement can fix this)
- Day length: both are usually grown at 16 h, so one timer suits both.
- Temperature: Pepper wants 24–29 °C, Cilantro (coriander) 16–24 °C. No range suits both. (Same for the whole tent)
- Humidity: both are comfortable at 50–65 % RH.
Light, stage by stage
| Pepper | PPFD | Cilantro (coriander) | PPFD | Suits both |
|---|---|---|---|---|
| Seedling | 265–345 µmol/m²/s | Seedling | 100–200 µmol/m²/s | none |
| Seedling | 265–345 µmol/m²/s | Mature | 210–310 µmol/m²/s | 265–310 µmol/m²/s |
| Vegetative | 400–600 µmol/m²/s | Seedling | 100–200 µmol/m²/s | none |
| Vegetative | 400–600 µmol/m²/s | Mature | 210–310 µmol/m²/s | none |
| Flowering/fruiting | 350–900 µmol/m²/s | Seedling | 100–200 µmol/m²/s | none |
| Flowering/fruiting | 350–900 µmol/m²/s | Mature | 210–310 µmol/m²/s | none |
They share a light level in 1 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
Light is strongest under the centre of the fixture and weaker towards the edges. Put Pepper under the centre and Cilantro (coriander) towards an edge or the back of the tent.
If Pepper still falls short, lift its pot on a box: closer to the light means more light, without changing anything for Cilantro (coriander).
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 Pepper and Cilantro (coriander) in the app and it shows where each pot gets its own light.