You can apply 4 lbs of Lomi Earth enhanced with Lomi Blends Lawn & Garden per 100 ft^2 of lawn annually. Lomi Earth with Lomi Blends Lawn & Garden can be added at any frequency, so long as you do not exceed the recommend 4 lbs of Lomi Earth with Lomi Blends Lawn & Garden per 100 ft^2 of lawn annually.