Q: I have a simple question I hope you can answer. I live in Georgia. My front yard is Bermuda and my back yard is fescue. How often should I water my lawn? J.C.-Georgia

Not such a simple question J. The answer depends on how much you want to spend on watering. The Bermuda is of course a warm season grass and can handle your hot Georgia summers. The fescue is a cool season grass and doesn't handle the extended hot weather without a good bit of water. The time to water each of the plants is when they begin to show signs of stress.

Typically grass needs water when the leaves turn a light gray-green color and seem to curl along their length. If you walk on the grass and can clearly see your footprints behind you, the grass is drought stressed and in need of water. Both types take approximately 3/4 - 1" of water at a time. The Bermuda will certainly go a much longer time between waterings than the fescue. So the answer depends on how much rain you get and how hot the weather gets.

One more point I should address: When to water?

There are differing points of view on what time of day you should water your lawn. The one point of agreement is DO NOT WATER IN MID AFTERNOON. This is typically when the sun is at its hottest and more water is likely to evaporate. This is doubly important if you're in drought conditions with watering restrictions in place. What this means is that even though you put down 1" of measured watering, a substantial amount of that evaporates before it
soaks into the soil.

If the weather is extremely warm, including the nights (low temperatures typically above 67), then, if possible, water in the evening. This substantially reduces the amount of evaporation and gives the water plenty of time to percolate down to the root zone. However, if nighttime temperatures drop below 65 at night, then early morning watering is preferred. Wet grass in cool temperatures increases the chance of disease infestations.