My growbox is on the balcony, at night air temperature drops to 15 ° С.
- what is the lowest temperature that is safe for the plant "at night" (according to the schedule of daylight hours)?
- what is the lowest temperature that is safe for the plant "during the day"?
Effects?
Basically a 10° drop when lights out is fine. Plants can go down to near zero without hurting the plants but it slows it's metabolizem and the plant slows in growth, takes a day to recover before she picks up her pace again. So 10° difference from lights out keeps them vigorously growing/flowering. Cheers
Use lights in the night so you can fight the low temps
The safety depends on the stage of the plants, in flowering with 15c you can grow, in grow plants will start to have problem especially the smaller ones