His ratios are as follows - 5:1:16 NPK with the K 2:1 insoluble:soluble
Your current ratio -
?:1:13 insoluble
2:0:3 soluble
I would recommend adding 2 parts soluble N, 4 parts insoluble K, 2 parts soluble K, .5-1 part P. I would also recommend adding some insoluble N but no idea what to...