Can't tell

I am in week 3 of flower and at first I'd have one or two like this. Thought nothing of it. Then it's like over taking my plants. Have a look

Using the general organics line.

looks like they could do with some nitrogen and magnesium

I also believe that you could up your solution level. Keep in mind that as these plants mature, they use up stored nutrients in the leaves as you see. If you feel this is happening too soon in the flower phase, then add a stronger mix for a couple weeks, and see if it slows down the yellowing of fan leaves. The leaves on the buds look decent. It appears that only fan leaves are turning yellow, and that is somewhat normal. Peace

What would cause it so suddenly. Bad Water? I put a little heater in there maybe heat stress?

Umm no, they just told you...up the feeding, its starving to death

I'm siding with the big boys. Needs more feed.

-spek

I concur they are hungry

Thanks for the advice guys

Glad to help. Happy growing!