Rough Bluegrass - Poa trivialis
Grows well in shade, does not tolerate full sun
Needs regular watering, can not tolerate drought
Fine-textured, bright green, with soft, shiny leaves. Thick dense, habit, spreads by stolons, or runners
Rough bluegrass is a bright green, fine-textured, shallow-rooted relative of Kentucky bluegrass. Although it is not as versatile as Kentucky bluegrass, it is often used as a substitute in moist soils and shade - conditions that don't suit Kentucky bluegrass.
In mild climates, rough bluegrass will retain its color over the winter, and because it can live without full sun, it is often a component in some shady-lawn mixtures that also contain perennial ryegrass, fescue, and Kentucky bluegrass.
It is sometimes included in a seed mixture with Kentucky bluegrass because of its shade tolerance, however, due to its tendency to produce bright yellow-green patches, it does not blend well with Kentucky bluegrass unless mixed with other grasses like rye or fescue to smooth out the color difference.
The major weaknesses of rough bluegrass are its intolerance to drought and high temperature.
It responds vigorously to fertilizer and irrigation, and under conditions where water is supplied too frequently, it can become quite aggressive.
During warm summer months, because of its very low drought and heat tolerance, rough bluegrass can wilt and brown-out markedly unless careful attention is paid to its water requirements.
The grass blades grow upright at first, but if they get too long, they tend to lay down and mat.
Optimum Mowing Height: 1.5 to 2.5 inches (3.8 to 6.4 cm)
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