You're not out of the woods yet.First why did you change your light cycle you're in bloom? I hope you only changed the cycle for he sick plants and left the healthy ones alone.

Second what's the pH of the soil. May deficientcies are the result of incorrect pH. If you have a liquid tester where you put water in a little container ad a few drops and shake, Then take some soil put in in a little pH water, let the soild settle then check the pH. You can also check the pH of you run off water.

Third did you feed the sick ones again? You should stop and put them on only pH water. With 2 weeks left in flower I think the goal here is to figure out how to fix the problem so you know for next time not produce since she isn't budding.

Do you know when the water? Stick you finger gently into the soil over an inch down if it is still moist leave it be, if it is dry then is a good tie to water. lso you want just a little coming out the bottom so you know it is evenly watered, but don't let it sit in the run off.

I'm flipping through my book here noticing similarities regaurding many different elements. That means that you have a pH problem or and excess/deficiency or one element is effecting the ratio of the others and throwing the whole thing out of whack. I hate to say it but sometimes less is better especially when it comes to nutes. One of the other nutes that I suspect it you Phosphorus which would make sense sine everything tell you that plants need more P while flowering so you want to make sure they don't run out.

I don't know what else to tell you man, I could sit here all day but baby's waking up, gtg, good luck.
Chronic Chrissy Reviewed by Chronic Chrissy on . Sick plants, black leaves curlinng etc, overwater? I cant' figure out what the problem is, I've got 5 plants I just switched to flowering about 2 weeks ago, 3 are looking great and budding nicely, 1 has been dieing and not budding, and the other one is on that same path, spreading these Black marks all over the leaves, and then they turn yellow and curl up and are cruncy/die and i have to pull them off.. It spreads from the bottom leaves and gets all the way to the top leaves, only the newest growths are green, but the 2nd to newest growths are Rating: 5