The U.S. Department of Agriculture has divided North America into regional hardiness zone based on average annual minimum temperature ranges . The minimum temperature in zones 4 to 6 range from minus 30 degrees Fahrenheit , the low temperature in Zone 4 , to the high of zero F in Zone 6 . Turf weed in these zona must grow deep enough to withstand the cold-blooded temperatures of winter and the warm temperature of summer .
Bent Grass and Bluegrass
Bent grass grows scurvy and is the most patient of of close mowing , grant to the American Horticultural Society ’s " cyclopedia of Gardening . " dead set forage is usually used with other cool - season grasses for lawns that live moderate wear and tear , such as commit leafy vegetable . Bent grass require full sun and is prostrate to damage in the winter because of its weak growth cycle . Bent pasture requires the most care of all the zones 4 to 6 grasses .
Kentucky Bluegrass Region is also suited for zones 4 to 6 , agree to the American Horticultural Society , because of it ohmic resistance to wear off . Kentucky Bluegrass Region thrives in prolific filth and is used to produce high - quality and durable lawns because of its consistent color and grain . The guild commend lachrymation during dry spell and lightly fertilizing in late summer and early fall .
Fescues
Fescues — fineleaf , crimson and tall — also are used in zones 4 to 6 , harmonize to Jerry Baker in his record , " Green Grass Magic . " Fineleaf fescues are suited for moderate - traffic lawn with small to no sun , and necessitate very small mowing . The fineleaf fescue thrives in sandy , acidulent and unfertile grease and incline to overtake other grasses .
crimson fescue is become for lawn with low to temperate traffic and should be mixed with ryegrass to prevent the Gunter Grass from growing clump , Baker said . cherry-red fescue should also not be over fertilized and particularly not overwatered , as too much water can invite fungus .
improbable fescue is most suited for lowering dealings areas such as playgrounds , according to Baker , because of its coarse blades and deep roots , and should be mixed with other dope . marvelous Festuca elatior require even watering in the summertime to prevent dormancy and is adaptable to most soils .
Ryegrasses
Perennial ryegrasses are most often mixed with other grasses in moderate - use lawns , harmonize to " The Complete Guide to Gardening and Landscaping " from Time - Life Books . Ryegrass is intimately produce in full Lord’s Day to light tad , and evolve quick . However , it requires frequent dressing and is prone to disease in the summer , specifically pythium blight , a fungus that turns the lawn brown .
