Overseeding is best done in late summer or early spring.
When starting a new lawn, it is good idea to improve the soil base. Any weeds or old grass should be removed. The soil should be loosened and a good topdresser added and raked level to match up to the existing grade. York Nursery applies top quality seed blends that are endophyte enhanced for improved insect resistance. Seed is spread over the soil at full recommended rate for new lawns. Grass seed must be close to the surface to germinate. A thin layer of peat moss ¼” thick over the grass seed is added for quicker germination. The soil is lightly tamped to ensure the seed is in firm contact with the soil. Seed germinates best when temperatures are between 15-25 degrees Celsius. In cooler temperatures, seed takes longer to germinate.
When York Nursery re-juvenates thinning lawns, a sod slitter machine is used to cut vertical slits into the existing lawn and then, drops the seed in behind.
Please note that, when soil is dug up or roto-tilled, it exposes weed seeds that have lain dormant. Once these seeds are exposed to the light, they will sprout. Weed seeds can also be carried by wind and settle into any bare patches of soil and sprout. If you notice any weeds developing, remove them while they are young to avoid root competition with the grass.
Grass seed takes approximately 6-8 weeks to germinate.
Water daily, keeping the top inch evenly moist for a few weeks. Once you start to see the grass greening, you can cut back on the watering schedule depending on weather conditions. Continue to water during periods of drought. Fertilize the lawn once it has filled in.
Do not use any fertilizer with Corn Gluten when seeding.
Heavy rainfalls can cause seed to re-locate.