Quote Originally Posted by kharma View Post
hi big steve
do all varety of orchids require the same level of tds when you are mixing fertilizer or do some have a higher rate than others
karma, I know you weren't talking to me but, in my opinion, it's better to be under them to be over. I believe, if you really want to get technical, you can buy something to test for tds. I'm guessing certain orchids have a greater or lesser tolerance for tds as a ratio to the pure water......anybody?