Kill existing lawn by applying herbicide to the grass area. The chemicals will take approximately three weeks to kill all grass and weeds. Clear dead grass and debris prior to tilling the soil.
Till the lawn area to loosen soil to a depth of at least 4 inches. Rake and smooth the area by filling in low areas and holes. Adjust the grade of the lawn, if needed. All debris must be removed from the lawn prior to seeding.
Verify the soil pH level with an at-home pH test. Consult with this page https://homeguides.sfgate.com/change-soil-ph-lawn-grass-69584.html as to the appropriate pH level for the grass type being used. High pH levels are lowered by applying sulfur to the soil. Increase the pH level of the soil by applying ground limestone. Start by applying small amounts of the substance to slowly change the pH. Test the soil after several days and apply more if needed.
Use a lawn roller to lightly compact the ground prior to seeding. A lawn roller looks like a small manual steam roller and can be rented from a local gardening or rental store. Fill the lawn roller a quarter full with water for weight because hydroseeding does not respond well to heavily compacted ground.
Water the lawn well the two days prior to hydroseeding, making sure the water saturates several inches into the soil. Install underground sprinkler systems(if possible) prior to hydroseeding as this will assist with watering and prevent damage to newly planted grass.
Seed will germinate quickly and be ready for mowing approximately three to four weeks after seeding(faster in warm weather with proper watering) Contact us if there are any issues but please be patient as it does take some time.