when you water them you should check the soil like a couple inches deep first and make sure they need it. if it's the same thing I had, it didn't kill any of the plants, not even the ones that i couldn't get rid of it on, it just spread on them and made them deformed and purple, like really non-natural purple, like somebody dusted them with purple eye shadow in strange blotchy patterns, but simmer down, as your plants are definitely salvageable