Cool-season grasses
Feather reed grass (Calamagrostis acutiflora), 4-6 feet
Sedge (Carex), 3 inches to 4 feet ...
Cool-season grass: A grass that grows best in spring and fall, blooms and sets seed in late spring or early summer, grows slowly or goes dormant in summer, greens up again in fall, and stays green into winter.
Common cool-season grass seeds
If you live in cool season zone, here is some practical information concerning common cultivars. Most cool season northern states use a mixture of grass types.
Cool-Season grasses tend to grow best in the cooler conditions and climates, hence their name. You will commonly find cool-season grasses growing in the northern areas of the U.S.
Cool-season grasses should get three-fourths of their annual fertilizer allotment in autumn; warm-season grasses prefer their annual dose divided evenly between spring and fall. Cool-season grasses include Kentucky bluegrass, fescue and rye-grass.
Cool-season grasses are generally adapted to northern climates, where they grow vigorously in spring and fall and may turn brown in very hot summers.
Cool-season grasses should not be given high-nitrogen fertilizers during the heat of summer. It causes excessive, lush growth that requires more frequent mowing and watering, and the lawn becomes more susceptible to insects and diseases.
To help cool-season grasses get through drought situations, do not fertilize in early summer (late May, June or July).
Facts ...
Fescue is a cool-season grass that's commonly used for lawns, pastures and some athletic fields..
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Programs for Cool-season Grasses. The best time to fertilize cool-season grasses, including Kentucky bluegrass, tall fescue, perennial ryegrass, and fine fescue (creeping red fescue, hard fescue, sheep fescue, and chewings fescue), ...
Lawns composed of cool-season grasses such as Kentucky bluegrass and tall fescue are best aerified in the fall, when there is less heat stress and danger of invasion by weedy annuals.
Mowing cool-season grass 3 inches high is just as effective as using herbicides to suppress crabgrass, if not more so, according to research from the University of Maryland. Set your mower blade to its highest level.
Rhynchelytrum neriglume - Pink ruby grass - A small, cool-season grass from S. Africa that forms a 1 foot tall clump. In the fall the foliage turns purplish-red. The showy white-pink flowers bloom a foot above the foliage in the spring and summer.
Cool-season grasses should be cut at 3 1/2 inches, while warm-season grasses are cut at 2 inches. St. Augustine grass does best when cut at 3 inches.
'Karl Foerster' is a cool-season grass meaning it grows best at temperatures near 70oF, and the best time to plant is spring in the North; fall in the South and West. The plant does suffer in the heat and humidity of an eastern zone 9 summer.
Contrary to popular belief, spring isn't an ideal time to feed your lawn, particularly if you are growing cool-season grass.
Why? Because you will also be feeding young weeds! It's better to wait till fall for the major dose of fertilizer.
For instance, a good green manure crop for fall or winter would be a cool-season grass like winter rye. Heat-loving crops, like beans, are good for spring and summer.
These products can be used on tall fescue, fall overseeded bermudagrass in which the overseeded cool-season grass has been mowed four to five times and non-overseeded bermudagrass.
 See also: Grass, Spring, Soil, Water, Lawn
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