You don't have to tear out your existing turf. Join the yard and garden forum . Lawn Challenge - a lawn care guide. St. Augustine thrives in the warmest parts of Zone 4. Bermuda grass is vigorous and fast-spreading to the point where it often becomes invasive.
Deep roots allow it to tolerate heat and drought.
The hybrids, notably Tifway and Tifgreen, were developed for Southern golf courses. Although these hybrids look great, they require above-average nurturing that includes regular thatch removal. Improved varieties like Cheyenne, Del Sol, Primavera, Sahara, Sonesta, Sultan and Yuma are far less prone to thatch accumulation. And compared with the old common Bermuda grass, they offer better color, slightly improved density and finer texture. Zoysia is a good choice for most Southern lawns.