Around trees and shrubs, apply 3 tablespoons of Osmocote for every 2 feet of branch spread. For vegetable garden beds, apply the fertilizer once at the beginning of the growing season at the rate of 3 tablespoons per every 4 square feet or 4 tablespoons for heavy fruiting crops such as tomatoes.
The label will recommend an application rate approximately twice the rate that is normally recommended for 10-10-10 (i.e. 2 tbs./foot of height vs 1 tbs./ foot of height) In other words, the slow-release products recommend applying a twice-as-concentrated chemical at twice the rate of 10-10-10. That gives an effective four months of fertilizing!