hi all, i switched my plants from vegging to flowering yesturday, i have just checked on them now and they have started to fold over asif they are really weak. the temperature was really high and i am hoping they start to pick back up. wot can i do to cool the tent down im running a 600w hps bulb, i have my airflow set up correctly but its still stupidly warm! its a hydro grow by the way.
I have the same problem, used 600w bulbs for vegetating light on all time 24-7 and they were fine, just 4 days after changing to 12-12, and one day after topping up with soil, the top of the plants curled up and became brown and the lower leaves hang down. Did a soil flush on one of them, and thinking about buying new soil... this sucks! I put them back to 24hr light. Unbelievable fast they wilt.
Anyway you can monitor the night time temps? A 20 degree temp fluctuation between the day and night cycle will stress them out. Did you flush between the veg and bloom nutrients? If you could get us a picture that will really help. As far as cooling your tent, you need more air flow. what kind of exhaust/intake set up do you have? is it controlled or do you just leave them on?
I would not flush them yet. Give it a day or so. Can you take a pic and let us have a look? If you could take a picture either just before or just after the lights change, that would be best. The flash is a more natural light than the flowering bulb. I'll do my best to help!
I removed the dry wilted parts of the plants, looks retarded, added some baking soda yesterday to increase the PH, which I cannot measure. Today the plant that I flushed looks like it is doing better. I'm going to try to do the 12-12 again.