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Grasses respond and start to grow based upon temperature. Some grasses will start to grow in early spring when temperatures are still cool (Cool Season Grasses) and others will wait until the soil is warm and temperatures are more stable (Warm Season Grasses). As with any other perennial, success depends greatly on soil preparation and good drainage. Ornamental grasses require relatively low levels of fertility. Plants should be well watered the first season to help develop a good root system.
Grasses are clump forming or rhizome forming. Clump forming grasses grow in mounds or clumps. They mix well with other perennials and are not invasive. Many will increase in size slowly over time. The rhizome forming grasses, or "running" grass, spread by underground stems and can become invasive.
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