You can, but keep it watered. Early autumn is generally thought to be the best time to plant grass in the Northeastern US.
Fall is definitely a better option for you if your lawn has high sun exposure. If you plant grass seed now, there will be less competition from the weeds and crab grass that are abundant in the spring. Also many weed killers can prevent grass seed from germinating.
Grass seed is not like vegetables that you have to wait until after the last frost. You can plant grass a little early, but not too early. I live in South Dakota, and it gets cold as heck here. We are in zone 4, and I planted some grass seed today. There's still two or three weeks probably before the last frost, but there won't be any nights cold enough to kill the grass. I checked the 10 day forecast at the weather channel, first.
NH Senzai's birthday is August 23, 19XX :)
Newport NH. 411 Sunapee Street.
Doc Tonkin was born August 11, 1881, in Concord, NH, USA.
Scott Fredrickson was born August 19, 1967, in Manchester, NH, USA.
Dike Varney was born August 9, 1880, in Dover, NH, USA.
Bernie Friberg was born August 18, 1899, in Manchester, NH, USA.
Johnny Barrett died August 17, 1974, in Seabrook Beach, NH, USA.
laconia
Contoocook, NH
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lincoln.