U of M Gardening Information: What's wrong with my plant?

Turf > Irregular patches > Brown grass in low/poorly drained areas

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Occurs in lawns where standing water or saturated soils have recently occurred, especially if accompanied by high temps and bright sunlight
Grass is brown to black in color, and leaves may be soft and mushy
Affected areas have a foul, rotted smell
Soil below grass is wet, soft, and muddy

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Occurs where spring snow melt water cannot freely drain from an area due to blockage along edges of curbs, driveways, or sidewalks
Occurs in open areas of the lawn where water goes through frequent freezing and thawing cycles during the snow melting process
Long strips to irregularly shaped areas of dead grass
Color of dead grass typcially is light tan to straw-colored, later turning dark brown
Usually a distinct boundary between affected and healthy plants