Diagnose your lawn
If you need to contact one of Forevergreen Canada's experts about a problem with the appearance of your lawn, here are photos and information that will be certainly very useful.
Large circles that are green on the inside and yellow on the outside
Necrotic ring spots
Microscopic fungi living in the ground cause the disease called necrotic ring spots. These rings can grow to over 30 cm in diameter.
Period when symptoms appear
Mainly during summer, especially during periods of environmental stress.
- Water frequently during hot, dry periods.
- Use organic fertilizer or synthetic fertilizer with slow-release nitrogen.
Use a shovel to remove infested patches down to 30 cm in depth (be careful not to contaminate healthy grass with infested soil), replace the contaminated soil with high quality soil and reseed with high quality seed.