John wrote:
Is it possible or even desirable to buy one breed of grass ? I was
thinking about putting in Thermal Blue after this summers brown-out of
my lawn but I read the package contents for Scotts Pure Premium
Heat-Tolerant Blue Grass Seed and noted that it's in fact only 10%
Thermal Blue and the rest is Tall Fescue.

I've never had good luck with Scotts seed. I don't know why. But Tall
Fescue has worked well. Lofts Rebel II is what I patch with and it seems
to have stayed fairly green here in the Boston burbs even though the
Summer has been dry. I've been hearing Jonathan Green's Black Beauty
advertised and bought 5 lb for patching.