Topics : Species and Forage Variety Trials : Species Fact Sheets : Warm-Season Grasses
Species: Warm-Season Grasses
Additional warm-season grasses information via the Forage Information System (FIS)
Big Bluestem & Switchgrass Fertility
While warm season grasses are good producers on low fertility soils, adequate P and K will increase stand vigor and production when these nutrients are low in the soil. Determine lime and fertility needs by a soil test. Lime is not necessary if soil pH is above 6.0. In the absence of a soil test, apply 0-60-60 per acre. Nitrogen is not recommended to use at establishment because it leads to increased competition from weeds. However, on sites with low fertility, good weed control, and a good stand of grass, apply 25 to 30 pounds of nitrogen per acre.
Maintain a pH of 6.0 or higher. Apply phosphorus and potash based on soil test. On established stands, apply 75 pounds nitrogen per acre annually in May when plants are less than 8 inches tall. Do not apply nitrogen in early spring.
Additional and more detailed information on forage fertilization is also available.