For the first time in decades of growing I've been dealing with leaf spot fungus this year. I have been using Copper octanoate 10% (copper soap) 4 tbsp./gal water with some success. I'm in my fourth week of flower and thought that maybe I should back off the copper and use something "milder" on...
This is my first post. I'm an old fart, been growing for going on 50 years mostly outdoors. I have been very fortunate as I have never had any plant diseases until this year. I should have jumped on this problem when I saw it on one plant but unfortunately I let it go and now it has taken over...
