Best NPK for Blueberry

Fruitnut  21:0:0  ammonium sulfate-one tablespoon per 2.5 gal water once a week April thru July
Fruitnut     9:6: 6    Osmocote slow release with 19% Sulphur
Al Tapla   3:1:2  general best ratio
Florikan    16:4:9

Osmocote
slow
release
for
acid
loving
plants