Lawn Problem Solver - Brown Patches
You’ve seen it before... Your lawn has been looking great all Spring and you want to keep it that way through Summer so you do your best to water a few times a week to help Mother Nature out through the hot Summer. Then, anywhere from early June to late August, these strange brown patches appear that only seem to grow in size, even though you water more and more...
Water isn't the Problem!
You most likely have a common lawn fungal disease! It is called ‘Brown Patch’ in Tall Fescue or Zoysiagrass and ‘Summer Patch’ in Kentucky Bluegrass. These fungi attack your lawn when weather is hot and humid during the night. Generally, if the nighttime weather is above 70 degrees and humid for several nights in a row, you should be on the lookout for these diseases.
These fungal infections present themselves as small, irregular blobs or rings of dead grass that grow in size as time progresses.
To confirm the diagnosis, take a close look at the grass that is starting to turn yellow on the outside edge of the patches. You will see that the tip of the grass blade is turning brown and curling up while the base of the blade remains green.
Prevention and Control
Follow these practices to prevent brown patch from infecting your lawn, and to control it if it does. Luckily, most lawns will eventually recover from these diseases without replanting as long as the issue is dealt with in a timely manner.
If your cool season lawn was severely damaged by fungus during the summer heat, you can easily overseed in September once the cooler weather returns. Be sure to use a preventative fungicide to help fight fungus next year!