how long after weed and feed can you reseed your grass
Most weed and feed fertilizers contain a herbicide that prevents seed germination, so it is recommended to wait until your new grass is well established and you have mowed it a minimum of 4 times (usually 6 to 8 weeks) before applying a weed and feed fertilizer.s crabgrass germinates all spring and into summer, you may require a second application of Greenview Seed Starter plus Crabgrass Preventer. Alternately, after your grass has been established (you have mowed it 3 or 4 times), you can apply Greenview Fairway Formula Spring Fertilizer with Crabgrass Preventer.