Need help with a deficiency

Hi everyone,

I'm trying to determine this deficiency. I using Sensi Grow A &B nutrients. Promix soil. The leaves are yellowing from the bottom up. The leaves are yellow with brown veins. I have posted a a picture below. Thanks for the help.

I would say N but I am probably wrong..

Hey Gs3000

Could you get a few more pictures by any chance?

Maybe early signs of the symptom?

I'm thinking Ca but need a few more pics to confirm for sure.


J

Get a calcium supplement.

Thanks everyone. The plants belong to a friend. I will try and get a couple more pictures. Mean while I had him check his PH, the water, then the water with nutes and finally the run off. His water came in around 7.2 and with nutes the Ph was too low to measure. So I think the low PH may be causing nute lockout. I recommended he do a flush and start making sure his Ph is always between 6.5 and 7.0. Do you think this will get the plants back on track?

I would concur on the flush and the ph should always be between 6.5-7.0. I try to keep mine around 6.5.

Give it about two weeks before you add the nutes and start with only half of what is recommended and build it up from there. That should help get her going green again.