my plants started doing this three days ago ( the bottom leaves tend to go down and are becoming more pale, also, one of them is curling up) anyone knows what's going on?
Seems like a N(itrogen) deficiency. Have they lost their cotyledons already? (if yes, have you fed afterward?)
When older/lower leaves starting to lose their green color and turning into yellow(ish) it's mostly N deficiency. That's all I know. Can we have a pic from the stems and branches? (in a closer view I mean) If not, do you spot any purple/red(ish) stem/branches?
I suspect a pH problem(and perhaps nutrient lockout?) which can block your plant from absorbing nutrients from the medium but even in that case, it had to use the stored nutrients(cotyledons) before it goes yellow on true leaves what medium you're using?
Sup Bro Everytime I had this happen it turned out to be pH. File under: FWIW Good luck UPDATE: Sorry Yazdan I didn't mean to step on your post... So I agree with you. I also didn't read the part about the purple..... That also could be N or cold temps.