Everyone, I'm doing a organic Super soil n my main amendments are going to be
Bat guano 7-3-1
Seabird guano. 0-11-0
Alfalfa meal. 2.5-0.5-2.5
Kelp meal. 1-0.1-2
Azomite. 0-0-0.2
Langbeinite 0-0-22 - is what I want to add for the extra potassium n Magnesium. It all Adds up to be alo more K= 10.5-14.6-30.5 Any Thoughts ???
NPK numbers are percent *by weight*. You can't just add numbers like that. If you want to know your aggregate NPK, you'd take the weight of each element in each amendment and divide by the total weight of the mix. Your math works if you use 100 g of everything, but that doesn't seem balanced.
Dr Reams suggests 1-5-2.5 is an ideal ratio in soil. Throw in a tsp of calcium carbonate, superphosphate and gypsum per cu.ft and you're good. Fish hydrolysate or soy meal would be preferred over guanos. hth
I use Gaia Green flower power, which is 2-8-4, at 2 Tbsp/gal of coir with a little dolomite lime. It works pretty well for how simple it is.