Applying a quick knock down insecticide such as Tengard and then following with a long term granule application will assist in making your flea control effective and work for the entire season.
Flea cannot survive in direct sunlight so concentrate on areas that are shaded are locate out from the way of the sun, under patios, under shrubs and trees.
Immature fleas mature in shaded areas accessible to pets and other animals. To activate the release of the insecticide from the granules, water the treatment areas with up to 0.5 inches of water directly following application.
Rate is 2.6-4.6 lbs per 1,000 squar feet
100-200 lbs per acre