Strange Dark Green Slime On Bermuda Lawn

Q: We have a strange dark green slime growing in my bermuda lawn. It grows “puffy” when wet and is very slick to walk on. When it dries it is almost flakey. It seems to be spreading slowly in my lawn. It tends to grow in the weak areas. 

A: The slimy balls are called nostoc. It’s a member of the blue-green algae family, although nostoc’s color is dark green. Like any algae, it loves spots that are moist or shaded. If that is your situation, consider covering the area with mulch or groundcover plants; bermudagrass hates growing on moist soil. An alternative would be to correct the conditions that weaken your grass (shade, excess moisture, etc) so the grass can reclaim the spots where nostoc lives.

  • Advertisement