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Leaf problem???
Esoteric_growingstarted grow question 4 years ago
Plants upper fan leaves are drooping and showing a spotting which is looks almost like calcium. Upper fan leaves are also curling like a heat problem yet temp is around 23 lights on but 12 at night, night humidity also rises to 95%. Ph 5.9, EC 1.3-1.4. Lights are 23 inches away.
Solved
Leaves. Color - Mottling
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Stonerdanswered grow question 4 years ago
The temperature difference between your night and day cycles are insanely high!! when growing cannabis you want no more than an 8 degrees Celsius difference (even that is quite extreme) between the cycles, not to mention your crazy high humidity levels during the night cycle.
This IS heat damage because when the lights turn on they instantly increase the temperatures by over 10C which causes that stress.
Try installing a heater on a timer which turns on when the lights turn off to balance it.
If this problem persists (which I doubt will) then it is a root problem!
Hope this helps! Good luck and happy growing :)
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