Cause of yellowing

does any one know if chemical burning is a cause for yellowing of the leaves? i have done a few soil tests and they have come up with bellow average amount of nitrogen, BUT i have been feeing them once every 2 days now. any sugestions?

IF your tests show now N, then why do you think you've got fert burn? Burn gives you brown tips and edges. N def gives you yellow leaves. You need more N.

What have you been feeding them?

been feeding them bio-gro, a organic fert. mix it up with water, 1ml with every liter. (8.0-2.0-6.0) feed once every 2 days. the leaves go yellow and then the tips go brown and crisp up, eventually the whole leaf crisps up

some pics, seems to be getting worse, really need some help asap!!

might have to flush to be sure, but if any one has seen this before and sorted it out please let me know.

thanks

up your dose of nitrogen.also what is the ph of your soil?what size buckets are you using?

ph is bout 5.6 have added lime to bring it up, and most are in 3 gallon buckets, and 2 are in 8gallon buckets. would lack of n cause the crisping of the leaves too?

yea leaves get crispy from a lack of n.your ph was low probably locking out nutes also.i would watch for signs of being rootbound on the 3 gallon pots.

before i start to feed them more just wanna ask if this definatly isnt a burn as i am a bit parra about this grow. would a burn turn leaves yellow at all? really appreciate your help!

you would want your ph to about 6.0-6.5
I think the tips going brown could be a little burn, but with your ph being 5.5, it affects the absorption, while the plant is draining the food from those leaves, causing the yellowing as a sign of N deficiency. It might be best to stop feeding, adjust your ph, and give water, it will mix with the ferts already present in the soil.

when in doubt, it wont hurt to not fert