Leaves curling under and in... im stumped!

So I have been surfing the forums to try and nail the cause of this phenomenon but I am stumped because everything about my setup looks good. My ladies have been in veg from seed until I sexed them, then I switched them to flower. Its been 3-4 weeks in flower and I only fed them once with high phosphorous bat guano (did not feed them before that at all). I am 100% sure this is not due to over fertilization. My pH checks out at ~6.7 in soil. I have good drainage. I do not overwater. I recently flushed the plants and no improvement... any clues what may be happening here??? Please check out the pic. Thanks!

You're watering too much.

Leaf curl down normaly means overwatering or overfeeding.
Leaf curl up normaly means heat stress.
Leaf twist is normaly a ph issue.

I read your post and i know you said you dont think its overwater/feed but thats where id put my money.

it's funny he says he doesn't over water, yet he just flushed. i wonder why the problem didn't go away -_-

kudaross said:

it's funny he says he doesn't over water, yet he just flushed. i wonder why the problem didn't go away -_-

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I wish you were right but... I let the soil dry until the plants started to droop and the leaf curl is still there, I don't think it is overwatering, unless the symptoms of overwatering, i.e. leaf curl, persist for more than one watering cycle

Leaf curl like this is usually N toxicity.

Unfortunately any effected leaves will never recover completely.

N toxicity can be caused by an excess of N or a pH imbalance.


J

The thing is, I fertilized the plants only once using high P bat guano, never applied any high N fertilizer during the veg stage...

kaarne said:

The thing is, I fertilized the plants only once using high P bat guano, never applied any high N fertilizer during the veg stage...

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in that case it is probably pH issue causing other Elements to get locked out and the only thing available in the pH range would be N.

Have you tried flushing with a weak 1/4 strength nute solution or a flushing additive at the correct pH?

J

I would be interested in learning more about these flushing additive's...sorry not trying to hijack but I had (possibly still have only time will tell) MG lockup..def PH problem.

jondamon said:

in that case it is probably pH issue causing other Elements to get locked out and the only thing available in the pH range would be N.

Have you tried flushing with a weak 1/4 strength nute solution or a flushing additive at the correct pH?

J

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flushed with 7pH distilled water... no additives, pH of soil was in the 6.5 ball park