Soil

Potassium gets locked out of soil growing at ph levels of 4.0-5.5
Potassium is absorbed best in soil at a ph level of 6.0-9.5. (Wouldnâ??t recommend having a ph of over 7.0 in soil) anything out of the ranges listed will contribute to a Potassium deficiency.

you must get a p.h testing kit ,the p.h. is the key.
goodluck:thumbsup::thumbsup::thumbsup: