This is only happening to my white widow plants, droopy leaves with black spots and there was one that had yellowish leaves with the tip dried.. 4x9x7'11 grow tent 1000 watt xxxl light... i have some clues since i did some research about this... humidity is low like 40% the max i don't know how to make it get higher, i also over watered them im new to this so i didn't know how much was enough or when to water them... any help is appreciated thanks.