Why do my C99 leaves droop every day durring lights ON at the same time?

[anon32470837]

Very interesting! Im glad to hear this is not uncommon.

@cannabissequoia

It’s saying: “my leaves are stressed every day & by the afternoon/evening i’m worn out but after a good sleep i feel normal again”

My guess is that the low(ish) RH% and leaf temperature are what need examination; with all other factors being optimal, that would be the limiting factor, imo(right?). And there’s that black plastic; Black raises temps 4-7 deg. F. & it could be increasing your air-temp at the micro-local level.

If you have a non-contact/laser thermometer I’d check leaf temps & plot them along the photo time-line… or just raise the lights, change the air-circulation & start misting.

The resting after a stressful day seems to fit the situation pretty well I think. I know the tent temps are on the high side. They are staying in the low 80’s and I prefer the high 70’s. RH is really low too, but not much I can do about that.

Rez temps are not a factor. The rez stays at room temp - which is in the 60 always this time of year. The root chamber also stays in the hi 60’s.

Im going to see if I can get the tent temps down and see if that changes anything.

Thanks for the replies