Hi all I am 6 to 8 weeks into flower (depending on when you start counting) Northern Lights photo period. Indoor cabinet 48 h x 36 w x 20 deep. Two plants using a homemade SCROG setup. Grown in FF Ocean Forest. Today I noticed these spots just starting on a few top leaves. I have pretty much decided to watch and wait. I am still feeding 2 times a week with FF (bb, tb, gb) according to the FF feeding schedule. Will flush in a week or so for final two weeks. Any Ideas what this might be? Kind of looks like calcium deficiency? Or maybe yellow leaf spot?
Jerk one off and look at the underside of the leaf with a jewelers loupe. Do you see any bugs? Also what is the run off PPM's and PH? This could be a start of cal-mag def due to PH lock out.
It is indeed mag def mate but the other guys failed to notice your plants massively over fed. The leaf shape and clawing effect aren’t bugs. It’s N tox, the only thing that causes it. Your getting lockouts from feeding too much buddy not deficiencies. Nute companies tell you to use waaaaayyy too much so that you buy more. I use about 15% of what the bottles say for a grow. less is best man. Over feeding plants slows down growth and massively hurts yield and quality.
I’m not a soil grower so got absolutely no idea how to help you but absolutely garunteed it’s over feeding.
You are absolutely right! My first grow went fine, so this time I thought let's push it.......... So I think I caught it in enough time to recover a little. With soil I just flushed plain water through, will watch and lay off the nutes. Thanks