Thus, it’s important to identify the type of grass used for overseeding. There are various types of grass that you can plant on your lawn depending on what you prefer. How To Water Lawn After Overseeding. I cut the grass very low before seeding, although I did not scalp it since it really had 75% cover+ and the original lawn was descent. Once the grass has gained a little height, you can ease back to your normal pattern. In general, however, you should not do any mowing during the first two weeks to four weeks after planting the new grass seeds. Hence, after lawn seeding, you had better wait for your grass to grow for a time and gain strength before the time to mow it comes. For new grass you want to be sure the grass has reached at least 3 ½ inches in height, if not more, before cutting for the first time. By following this, you can have a beautiful garden. The are not yest secured and will easily be removed. I think you can rent a reel mower from the big box stores. By the fact that you are overseeding I think we can assume you'll be OK losing/stressing the existing grass for the sake of new seeds. You also don't want to suck up the germinated ones. Damage to new lawns often occurs during the early stage of seed establishment. Check below: Step:1. 10 years ago. The water needs to get down into the soil. If you water for 15 every morning, you are losing a lot to evaporation. Maintaining a 2 or 3 inch height is critical; do not cut the grass lower than this range because invading weeds and heat stress invite pathogens and pests into the newly seeded lawn. Since roots anchor your seedlings into place, if you mow too early you can rip your new growth right out of the ground, negating all the weeks of watering and anxious waiting for the green to appear. We will give you some expert tips on how to water lawn after overseeding. For about three weeks after seeding, or until the grass begins to peek out of the dirt, set a daily watering schedule. Like all seeds, germinating grass seeds tend to be fragile. Hi, I overseeded with KBG around 2 weeks ago and most of the seed has started to come up. Too soon to cut after over-seeding? Once these height ranges are achieved, you can start cutting the grass for the first time. Knowing when to mow and water, as well as the correct cutting procedures, produces strong, healthy growth in newly planted lawns. Wait until the young grass is at least 2 inches long before mowing again. After overseeding your lawn, it needs consistent moisture. With the special care we all take I think the existing grass will be fine. If watering, water heavily every few days in the early morning, not lightly every day. The roots are no deeper in the soil at this this point than the seedlings are tall. WestchesterGrower. 6. After you lay down your seedlings, they’ll need time and the right environmental protection to grow. Otherwise, give it some more time and then mow the existing grass … Try and stick somewhat to the 1/3 rule when cutting the really tall existing grass, in other words, if you let it grow another week and it's 11" (but the new grass is like 3.5" and thus safer to walk on), cut it to as high as your mower will go and then cut it again in about a … You mow too soon. If you cut the grass too early, the wheels and blades of your lawnmower are just pulling your grass sprouts from the soil instead of mowing them. Therefore, you should always consider the type of grass that you are overseeding on your lawn in order to know how long you should wait before mowing your … Just about every lawn around me gets cut more than 1/3 year after year and they survive. If you can do it right before a rainy week, great. 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