I have some young plants in a solo cup filled with FFOF. I've been feeding it RO water only & I believe I'm starting to see a CalMag deficiency. Does FFOF need a CalMag amendment if you're only feeding RO water?
I was thinking of adding a little bit of powdered dolamite lime, but wasn't sure if that was necessary.
I was thinking of adding a little bit of powdered dolamite lime, but wasn't sure if that was necessary.