Fertilizer should be applied according to a soil test. The proper ratio is determined by what the soil needs, not by the type of grass. Usually it is not advised to fertilize, especially with a chemical fertilizer, this time of year. Brands generally are irrelevant, they are all about the same.

I agree with soccer dad and would just add that if you are talking about fine fescues, some of them actually start to suffer if you apply more than a pound or two of nitrogen per thousand square feet per season, and all of that should go down in the fall. IIRC tall fescue can use more nitrogen, but I don't know how much more.

TTTF can use 4 to 5 lbs of nitrogen per 1,000 on the high side, and about 1 lb per 1,000 on the low side. Once the lawn is fully stablished, the organic way is the best. I like Espoma Turf fertilizer 18-8-6 during the summer months, but you can also use Scotts 26-2-13 with 2% iron. But, ONLY if you are going to water when mother nature does not.

For the record, I just fertilized my lawn yesterday with Scotts 26-2-13, it rained today, so grass is green and happy. The reason I went with Scotts is because the place where I go to get Espoma was closed. The other option was Howard Johnson 13-2-13 for golf greens. I like this one the best, but like Espoma, it was not available either.

Summer picture of my Bluegrass with Fertilizer:

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