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*before lights on and after lights off

Pulled off every fan leaf and cleaned the grow room with EPM giving 25 minutes treatment before lights off and after lights off. With 15min on 1hr off thru the flowering day there was very little PM with in the plants and the worst leaf was picture nothing was near as bad as that leaf I’m...

Do you have any experience with spraying “Atak” in flower? Would i be wiping off leaves rather than spraying?

Im using the California solar UVB 24w it says it rated for a 4x4 at 3’ here is the spectrum

i recently discovery some mild PM on my plants a few days ago and since i have add 3 uvb lights under my 4x12 canopy as recommended by my hydroponics store,i just start week 5 of flower. (No spray for me) I had original though i creates the PM from A 15% humidity swing but i found the source...

I Have looked every where for bug but nothing.. yet these “holes” keep appearing every so ofter Any clues? week 7 of veg going to start flowering next week

Howdy! My girls have had these weird brown spots since about week 2 of veg(they are in week 6 of veg now) i switched from FF to GH in week 4 and was amazed by the new growth in the GH but the brown spots still came. It is RO water and i am using cal/mag 5ml per gallon the smaller one is in week...

I think 500 my ec is 1.5 and thank you! The responses are awesome thanks for the support!

5.6 ph

Im using GH and im at 850 ppm at week 4 of veg

Looking for helping identifying this yellowish brown spot