I'm using happy frog with perlite and vermiculite. Been using the fix farm dirty dozen nutrient pack at 1/2 to 2/3 strength every other watering, with a flush every 3 weeks using sledge hammer. All of this is under a 270w full spectrum LED.
Having the same issues man... Are you getting a lot of yellowing or just the spots? Mine started with a few spots, then just went to hell in a hurry, have had a lot of yellowing, some leaves are completely mottled with spots now. Week 5 from flowers or from flip? Mine started just about 4 weeks from flipping light. Still trying to fixJust starting week 5 of flower and she's looking pretty. I was looking at her today and saw brown spots had appear about to 3 branches down on one of my branches.
You can see it on the center fan leaf - notice the brown spots.
Another angle:
Any idea what this may be?
From Flip. It was 4 full weeks from flip on Friday.
We've got similar issues going on. Started at same time. I've also had a battle with the fungus gnats, tho I've been in control of that one for a bit now. I hit them with azatrol a few weeks into veg, then have used the sticky pads and 'clap method' when I see the little buggers. Only a few here and there now. I didn't pH my water until I started seeing these issues - spots and yellowing. I tried last night with a light watering of a light mix of Epsom salts, hoping that it needed a little magnesium. Time will tell I guess if I made a royal error. I use a 4x4 tent, 6 inch inline for exhaust, but do not scrub my outgoing as it just goes outside and I don't live close to anyone and grow legally. I don't have a 'real' intake filter.. I've got mine in 3 gal pots, 2 part happy frog, 2 part ocean forest, 1 part perlite. Temps typically top out at 78, but past week and half has been blazing and I've seen low to mid 80s, had to bring my lights up a little more. I only give you the info on mine as reference to see if there is anything similar that would be causing the same issue for us.
Magnesium and Maganese is different....epsom salt for magnesium
No. This is manganese def, not magnesium. Not the same word, not the same metal.
Yes, what @hells canyon genetics said.
Grow Weed Easy Manganese Deficiency thumbnail.
Well said. I can't disagree with your post. I will sit here on the fence and lurk more.
I went with the calcium deficiency after earlier comments and what I saw on growweedeasy. I read there that CalMag is bad during flower because of the nitrogen, so I went with lime and added 11 teaspoons to each plant and gave them each a gallon of water. Hopefully this fixes it, because these plants are gorgeous and have had no other issues.
