Annual bluegrass is a troublesome weed in all areas of the yard. In lawns it is not easily noticed because it resembles Kentucky bluegrass. Annual bluegrass prefers areas with moist, rich, or compacted soil. It grows most rapidly in cool spring weather. In mid- to late spring, white seedheads appear on the plants. The seeds fall to the soil and germinate in the cooler weather of late summer to midfall. Annual bluegrass is not heat- or drought-tolerant and dies in the summer in most areas.
Correct compacted soil. Reduce the chances of invasion by allowing the soil to become moderately dry between waterings when the seeds are germinating in the fall. This will also provide a measure of control if the plants become stressed because of high temperatures and drought in the spring.
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