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The best time to put grass seeds down is in the fall. This gives the seeds time to mature before the stresses of summer like heat, traffic, mowing and diseases.he best time to put grass seeds down is in the fall. This gives the seeds time to mature before the stresses of summer like heat, traffic, mowing and diseases.
Depending on where you live, the best time to plant grass may be in the summer months. Warm season grasses need to be planted in the summer since they require warm soil temperatures to germinate and grow. Otherwise if planted in the fall like cool season grasses are, they may still germinate but will most likely fail to make it through the winter season because they will not establish. With proper seedbed preparation and other care practices, you will find it is fairly easy to plant grass seed in the summer.