Its not that bad for anything under 5-10 acres. Just mix in a dash of soap and a lil salt, and fill a backpack sprayer. Soak the plant, specifically the leaves,

Its not that bad for anything under 5-10 acres. Just mix in a dash of soap and a lil salt, and fill a backpack sprayer. Soak the plant, specifically the leaves, and you have a very selective, very benign herbicide. Full grown plants take more than 1 treatment many times, but with thistles, you can just carefully remove the heads.