Overseeding with Fescue – Waiting For St. Augustine

Q: I am going to till my yard and sprig it with St Augustine grass. Is it OK to overseed with fescue until the St Augustine fills in?

A: The two grasses will compete for a couple of years, but your process is similar to what my neighbor and I did several years ago. We bought pieces of sod and tore them into sprigs, which we planted 12″ apart. Over the course of time, the St Augustinegrass has pretty much choked out the fescue. Once your St Augustinegrass has covered most of the lawn but still has a few clumps of fescue in it, use atrazine herbicide to kill the fescue.