Has anyone used oregano oil instead of copper sulfate? Having a hard time finding acidified copper sulfate.
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Thank youWhat are you treating, canker? Try here for ACS, and dosage is 1/4 tsp per gallon of water:
https://www.mcmurrayhatchery.com/acidified_copper_sulfate.html
I have read that thyme concentrate capsules have sometimes been used for canker, but don’t know about oregano oil.