Strange dark green colored circular shaped ring found on my lawn = FAIRY RING DISEASE
With the abundance of rain we have enjoyed over the past few months, you may have noticed a few odd looking circular shaped dark green colored rings (3′ to 10′ +/- in diameter) located across your lawn. If so, you are not alone. In all likelihood, the saturated soil below your lawn has initiated a very common fungal based disease called Fairy Ring.
The first signs of Fairy Ring disease are usually the appearance of dark green colored circles, arcs and/or mushrooms across the lawn’s surface. Of course, the mushrooms are a reliable sign that an abundance of buried decaying organic material is in the soil (old tree roots, stumps, etc.). As the fungi break down the excess organic matter in the soil nitrogen is produced giving the lawn located just above/around a healthy dark green color and a decent growth spurt (beyond surrounding non-affected lawn areas).
If Fairy Ring effected lawn areas prove to be seasonally persistent at your property and grass fails to grow/survive, then you may want to consider removing a 6″-10″ layer of soil located just below the plagued lawn areas, add clean topsoil and plant premium grass seed to repair the specific areas. There is no guarantee this soil replacement approach will be 100% effective, but may be worth the investment over the long term if your lawn continues to struggle.
In most cases, just by power raking (mechanical dethatching) the entire lawn in the spring, mowing frequently and providing routine lawn fertilization will increase the vigor/growth rate of the entire lawn and adequately conceal most Fairy Ring outbreaks that may occur over the course of a growing season.
Please contact Pacocha Landscaping Services, Inc. with any lawn care or lawn repair services needed at your property. Thank you for visiting and have a great day!