brown areas in lawn
What type of lawn? Tall fescue? Tall fescue is a great choice for Delaware but does have trouble with brown patch - The most common and important disease of tall fescue in this region is brown patch, caused by the fungus Rhizoctonia solani. Brown patch is primarily a mid-summer disease, but may occur anytime when night temperatures exceed 70°F and grass blades remain wet for periods of 10 hours or longer. Two weeks ago was too late for lawn fertilization. Most fertilizer should be applied in the fall, with only a small amount applied in early spring for quick green up. Fertilizer applied in late June to early July stresses turf at a time when most cool season turf struggles with heat and humidity. If the problem is brown patch, the grass will outgrow it once cooler weather returns. There is no need for treatment, but don't apply fertilizer during the summer next year.