NPK for soursop tree

Question

Answer is satisfactory. But in order to enhance fruit production I will try a high P, e.g. 13-40-13. Grass around an under tree is presently getting high N.

Answer 1

Applying fertilizer that your tree doesn't need can create nutrient imbalances. You can do a soil test to determine if your tree needs more or less and avoid guessing.
I would avoid using lawn fertilizer around the base of the tree.