how long to leave straw on grass seed
First Cutting of a New Lawn. Until grass seedlings are 2 to 3 inches in tall, they should remain covered by a straw mulch and foot traffic should be avoided.Grass seedlings will typically take from three to five weeks to reach this height, although it may be different depending on weather conditions.irst Cutting of a New Lawn. Until grass seedlings are 2 to 3 inches in tall, they should remain covered by a straw mulch and foot traffic should be avoided.