We do not recommend this for 2 reasons.  First, in order to seed in the spring you can not apply the pre-emergent application for crabgrass prevention thus creating a weed infestation all spring and summer.  Secondly, if you seed in the spring the new seedlings will not have enough time to root deeply enough to protect themselves from the harsh heat and humidity of July and August.
OUR RECOMMENDATION:  Core aerate and over seed your fescue lawn between mid-September and mid-October.

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