Thatā??s a good question

Phosphorus (P) is mobile. Marijuana likes P and many strains will thrive on extra P but there is down side. P in excess interferes with calcium, copper, FE, Mg and Zn stability and uptake. Organic versions are Bat guano, steamed bone meal or barnyard manure. Itā??s a balancing act like everything else. Start with a little extra at a time, you can always add more later but itā??s a bitch to take it out. What you need to look for in toxic shock is stunted growth; small leaves with a bluish-green color often with blotches. Stems and leaf stems man turn reddish to purple starting from the underside. Older leaf tips turn dark and curl downward.


Donā??t feel bad I had to check my past notes on this one.