Is this Nitrogen Deficiency?

DB&ST

DB&ST

Well-Known Member
Is this Nitrogen Deficiency?

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Edges of the older leafs are yellowing.
plants are 30 days in veg. only started giving them nutes yesterday after i decided that it might be N deficiency.

Watered them with a 1/2 dose of BioGrow.

What do you think?:?
 
potting soil from a near by growshop.. supposed to be good for MJ, lot's of satisfied costumers..
 
I'll bet it a PH prob causing a lockout....cause that soil looks plenty rich......test the PH....I would'nt give that plant anything to eat....the leaves look like it's getting plenty to eat....PH/ soil and water.good luck
 
don't know the soil pH.. but i do give them 6.5 pH water..
next time i water i'll check the runoff..
 
you mean soil getting hot? i don't think so.. it's not over 75 in the day, and in the night it's cool...
 
i have to agree that it looks like nute burn from very rich soil. what brand of soil do you use? how cold is it at night? it may be a reaction to colder temps. could you get a clearer pic of the leaf? it might be your camera, but there appears to be some spots on the upper surface of the leaf that could be bug damage.
 
ill try to get a better picture..
the spots are just on camera.. the lower leafs are a little dirty from dust that was in the sky.

at nights it get's to 60 maybe.. but not any lower.
 
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