Leaves curling in DWC

[Green Thumb MN]

day 15 of 12/12, day 61 from seed
LED and T5's
Room temps are 65-70
water temps 65-70
r/o water, ppm 25
GH flora nutes ppm~550
pH 5.6-6.4



Some of the leaves are curling down



Others look great. Some older and some newer.



And I have one leaf that looks like it was run over, right on the top of the plant and no sign of bugs.

All replies appreciated!!!

 

[Green Thumb MN]

Added some CaliMagic with my pH check today. Running out of ideas. HELP!

 

[ThePerfectGrow]

Too much nitrogen can cause clawing n it does look like some type of nute burn from the leaf tips.

 

[Green Thumb MN]

Thanks TPG, that seems like a good bet. I will drop the nitrogen some more.

 

[PetFlora]

Plants actually need more N than people realize.

See Hydroponic Research VEG+BLOOM NPK ratios

How old are your nutes AND do you shake the shit out of the bottle before mixing?

I would remove a couple lowest nodes shade leafs to get some air in there.

Also as I asked on your other thread, "Are you using a fan"? If yes and the fan does not swivel, you are drying out the leaf surface. If it doesn't swivel, put it on a timer 15 m on, 30 min off

hth

 

[Green Thumb MN]

Plants actually need more N than people realize.

See Hydroponic Research VEG+BLOOM NPK ratios

How old are your nutes AND do you shake the shit out of the bottle before mixing?

I would remove a couple lowest nodes shade leafs to get some air in there.

Also as I asked on your other thread, "Are you using a fan"? If yes and the fan does not swivel, you are drying out the leaf surface. If it doesn't swivel, put it on a timer 15 m on, 30 min off

hth

The small fan inside the tent doesn't move and was, at one time, directly over the plant with the curling leaves. hmm I will try the timer, easy fix. tnx again!

edit: I do shake the nutes, but not a bunch. They were bought from the local hydro store at the start of this grow.