Spots on some of the leaves

[smoorman]

This spot pattern is starting to show up on some of the leaves of my plant that is just starting week 6 of flower. You can see it on the other side of the leaf but it's not as dark. Based on what I'm observing it appears to be going through the leaf. It is not a separate pattern on the underside. Any ideas?

 

[Mr.furley]

If your pH is on for the medium? you growing in and you don't have Bugs, it looks like a potassium deficiency. But more info could help.

 

[smoorman]

I just checked Ph of nutes going in 6.6-6.7. Corrected to 6.0 and fed. Nutes are FF trio @ 900ppm fed everyday. I'm pleased with overall growth.
It looks like it's leaves with direct exposure to the lights. No shaded leaves are affected. Also, affected leaves sit higher in the plant. I started using "flower fuel" recently. 34% phosphate 32%K2O 2%S
Possible light sensitivity? Plant next to it has no symptoms

 

[Mr.furley]

Yeah it looks like a light issue on the one plant, can you raise the light any?

 

[smoorman]

Actually, the lights were somewhat lower for a day and in the photo shown are back up. I'll move to front a little to add couple inches distance. Keep you posted. Thanks