Please help me determine how much Copper Sulfate pentahydrate powder to add to water
Hello! After a few decades, I'm growing orchids again, and I have a lovely Brassia, which unfortunately has fungal rot at the base of the largest pseudobulb at one end. As stated I have a finely powered CUSo4*5(H2O). How much powder should I use in say 1L to reach the effective concentration for my intended purpose? Thanks!