Ask Greenman: “My Leaves are Turning Yellow”
“I have a dwarf growing in a hydro setup but it has a deficiency; the leaves are turning yellow. I think it may be the PH levels but all info and help is grateful”.
The Greenman: It is most likely your PH levels that are causing the yellowing of your leaves. A level of 5.8-6.0 should be what you are looking for in a hydro grow.
You mentioned to us that you have a hydro set-up. Try using only filtered water in the system once a week. For example, use fresh water and fresh nutrients from Monday-Saturday and then use water only on the Sunday.