How to Apply Safe Lawn Application Safe Lawn is granular, making it easy to spread.  Apply Safe Lawn twice a year, spring and fall (however, some customers report even better results applying once in July too).  In the spring, apply before the forsythias begin to bloom and up to the time they bloom.  In the fall, apply after the long hot period of summer has ended.   The application rate for lawns is 50 pounds for 2500 square feet.   For lawns, use a spreader setting at approx. 2/3 open.    Do not use on newly seed lawns or gardens.   For gardens, work Safe Lawn into the top 2 to 3 inches of the soil.   Safe Lawn should be deeply watered in after application and then allowed to dry.