I'm sorry i meant to add seed to the existing lawn not completely redo
the lawn.

No One wrote:
I read at various places to not put tall fescue seed in a kentucky
bluegrass lawn. My question is this: I think I have a lawn filled
with K31 tall fescue. Is ok to reseed it with a newer variety or
should I stick to K31 for a more uniform appearance?
Thanks.