Copper spots on leaves. Did well with his strain last year had one seed left. Believe it is Thor’s hammer. DWC three weeks old Was under fluorescent a week ago. Now under mars Hydro 650 at 25% just sledgehammered, and started over with fresh nutrients, 1350 PPM, PH 6.1 and added Cal mag
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Welcome to the forum.
What is the pH and PPM in your reservoir? What nutrient product(s) are you using?
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Using Fox Farm Hydro, PPM 1350, PH 6.1 following Foxfarm feeding schedule for hydroponic
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Thanks for the welcome I’ve been reading the site for two years first time I’ve reached out for help
It seems to be the older leaves are the problem. Have you had any pH or PPM excursions out of range in the past? I’m inclined to believe that is the case and not to worry about it so long as new growth is fine.
Perhaps adding silica without adjusting pH?
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I’m not familiar with silica?
It is a beneficial additive that helps the plant with the strength of its cell structure. It is very alkaline and can cause problems if added to a reservoir without pH adjustment. Your symptoms are consistent with a pH problem.
I had a similar problem with a plant last year where I forgot to pH adjust my silica feed. I had no further problems with new growth after corrective action was taken.
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I agree @MidwestGuy i thinking ph. At 6.1 youre on the high end and that would be during flower stage. For veg i would focus on 5.6 to 5.8. The nice thing about hydro is the adjustments are effectice immediately. Keep us posted. Thanks for sharing
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