im4satori
Well-Known Member
i only point this out just in case anyone else is reading and to not confuse themYea, many , many growers don't understand the relation between phosphorus, calcium and magnesium.
people buying "bloom buster" or "bud hardener" or whatever-the-fuck, and then they wonder why their leaves drop off like flies after..
I usually go with around a 3/1 or a 4/1 ratio of the cal to the magnesium for organics, but it's hard to tell how much they are really getting, since i topdress with comfrey a lot and my water is well water, so they have a good amount of calcium and magnesium being utilized.
But calcium for cannabis is damn near a macro nutrient, it's used a LOT, probably moreso than phosphorus.
i can tell you one thing though... don't use black strap molasses as a source of nutrients...
the ratio of cal to mag is inversely opposite to what you want, like 1/4 or so
I understand you meant potassium, but you wrote phosphorus
don't worry I now what you meant
how do you go about figuring you ratios? do you use the % amounts for each element?
I understand what your saying, it really is going to change in the depending on the speed at each element degrades or decomposes into available mineral so theres no exact measurement like in hydro
but I cant help but wonder if theres still some meathod in an organic soil amendment that gets close enough to equalize the appropriate ratio
I supoose a soil test would tell you where your at but by then its a bit late
the amendments have % amounts listred for the available elements but im not sure how much of the magnesium comes out of the humus/compost/EWC