● By overseeding Bermuda with annual ryegrass, cool-season grass seed can be interspersed in a warm-season lawn to provide green color in colder winter months. You can also overseed bare spots during the growing season. ● All lawns can benefit from aeration, something to consider especially if you overseed. ● The varieties that do best in the transition zone tend to produce more thatch from stolons and rhizomes, so you will want to consider regular dethatching.   ● You will want to develop a knowledge of mulch, and how to apply it around trees and flower beds.