I have a primarily Bermuda grass lawn, but there is a shaded area that the Bermuda will not take to. I've read that Fescue is shade tolerant. Would it make sense to seed Fescue in this area and just keep the rest of my lawn Bermuda? Does this question make sense? Also, should I use a week killer before or after seeding and what is a good time frame in between? Sorry for all the questions, but this is my first lawn and I want it to be nice! Thanks!