Poorly W.Widow 2-3 weeks from Harvest

[Kevoz393]

Hi there any help would be great..

I have a WW auto about 50 days old, I have had problems shortly after topping with brown spots and yellow tips anc they now look like the pics..

it’s either calcium or mag deficiency or a ph problem causing lockout but I could be wrong..

I think my ph is to Low as the run offis roughly 4.9 ph.. I have been feeding at 6.5ph but it’s not going up and that 5-6 days later..

I’m growing in coco, 400w LED and using canna A&B, Canna boost plus Buddha tree PK - I’m wondering should I drop the pk and canna boost and A&B and just use Big Bud Overdrive??

 

[armanidog]

The first thing I would do is see if I could get the pH up. Do you have pH UP and pH Down? Perhaps raise the pH to 7.0 for your water and hold off on nutes until your runoff is up over pH 5.
The older leaves will not change much but any new leaves should not have those yellow spots.

 

[Kevoz393]

The first thing I would do is see if I could get the pH up. Do you have pH UP and pH Down? Perhaps raise the pH to 7.0 for your water and hold off on nutes until your runoff is up over pH 5.
The older leaves will not change much but any new leaves should not have those yellow spots.

 

[Kevoz393]

I do have ph up/down and I will add just water at 7ph to see will it improve..

Thank you very much