Brown Patches In Lawn: Common Causes And Prevention For A Healthy Lawn (part 1)

❌Fungus - Main Cause of Brown Patch
Fungus is the most common cause causing brown spots with irregular patches, usually the fungus Rhizoctonia. Brown patches are summer lawn diseases when the daytime temperatures reach 65 to 85 degrees. Fungal diseases often cause patches of dead grass from mid-to-late summer - when there is hot and humid weather, or even spring (when the snow melted).
Severe rainy or humid weather along with poor air circulation and the lack of sunlight will encourage an ideal condition for fungal outbreaks. If the brown patch disease is active for a long time in the lawn, it will leave a ring of dead grass around the patch, and luckily, the grass inside can recover.

There are several reasons for brown patch fungus in addition to hot and humid conditions. Excessive nitrogen (or low level), poor soil, lack of fertilizer and air movement, too much thatch, and compacted soil are also factors that promote a fungus problem. Although you cannot control the weather, there are some steps you can take to protect lawns against fungus.

Aeration and dethatching in the spring are two first efforts in preventing fungus. Proper watering, maintaining nitrogen levels at the optimal or applying fungicide all help control the fungal growth.
Here is some information for your reference, if you have any questions, please contact GREEN ARBOR LANDSCAPING (206) 265-2940 for advice.