got a few autos(dina cheese and ultra lemon haze) in 3 gal smart pots with FFOF..about 17 days old..no nutes yet. Can I add cal mag? Do I need to? What do I look for to see what they need? Will get FF big bloom and tiger bloom soon..but have cal mag laying around. Anything anyone can tell me is appreciated.
If your plant isn't showing calmag deficiency, there is no need to add it. If you're using regular tap water, it has calcium and magnesium.
alright, thanks man. But, the lower/older leaves are yellowing..starting at the tips.. Is that nitrogen def?