I can't live without it. Way too much fungal pressure in humid Florida. Serenade is an organic fungicide, but it just doesn't work as well. Of course, I grow in containers and they are soil and earthworm free. That's because of a different kind of worm, nematodes.
And I use my copper spray at 1/2 of the weakest recommended strength. I might think differently if I needed to build the soil.
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