re: Can someone tell me what's up with my lawn?

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Virginia buttonweed is not readily controlled by most lawn weed killers. It is one of the most difficult broadleaf lawn weeds to keep in check. A multiple active ingredient lawn weed killer that contains carfentrazone should work best. LSU AgCenter trials indicate that the best products are a combination of 2, 4-D, mecoprop, dicamba and carfentrazone - such as Ferti-lome Weed Free Zone and Ortho or Weed B Gon Max for Southern Lawns.

If the Weed Free Zone does not provide adequate control, a professional option to try is Celsius herbicide. Best control starts in the spring. Make an application of one of these products over the entire lawn in early April and again in early May. You also should expect to make repeated herbicide applications through the summer.

During the summer, the recommended lawn weed killers are more likely to discolor or damage the lawn due to high temperatures. (This is most likely to happen to St. Augustine; centipede, zoysia and Bermuda are less likely to be damaged). ...

Be persistent. In LSU AgCenter research, it often takes four applications of herbicide to keep this weed in check and under control.

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