Big bluestem
Big bluestem (Andropogon gerardii) is the backbone of the North American tallgrass prairie and the #1 warm-season grass in most CP25 and CP2 mixes. Its 'turkeyfoot' seedhead, deep root system, and clumped growth make it the standard against which every other native grass is measured.
Why landowners plant big bluestem
- Roots reach 8–12 feet — outstanding drought tolerance and carbon storage.
- Bunch-forming growth leaves bare ground between clumps that quail chicks and pheasant broods use for travel.
- Excellent forage quality — palatable to cattle and bison well into fall.
- Ecotype seed is widely available across the Midwest, keeping mix costs reasonable.
Site fit
Big bluestem thrives on mesic to dry-mesic upland silt loam and loam soils across the tallgrass prairie region. It underperforms on hydric wet-prairie sites (switch to prairie cordgrass) and on excessively droughty sand (switch to little bluestem and sand lovegrass). For CRP practices, it is a required component of most CP25 tall-grass mixes and appears in every diverse pollinator blend as a nesting-cover grass.
Establishment
Big bluestem seed is chaffy and requires a native-seed drill or broadcast + firm cultipacking. Plant 1/8 to 1/4 inch deep — deeper plantings fail. Germination takes 2–4 weeks in warm soil; expect a slow first year with root establishment before visible top growth. A high mow at 6–8 inches during the establishment year controls annual weeds without harming seedlings.
Management
Prescribed burn on a 3–5 year rotation in late spring (April–early May) stimulates tillering and controls cool-season invaders. Rotational grazing after full establishment (year 3+) is compatible with CRP CP42 and CP25 as long as stand health is maintained.
CRP practice fit
Primary tall grass in Iowa, Illinois, Minnesota, and eastern Great Plains CP25 mixes.
Anchor species in permanent native grass plantings.
Included at reduced rates (1–2 lb/ac) to provide pollinator nesting cover.
Standard component of bobwhite quail edge buffers.
Featured mixes with big bluestem
Pairs well with
Indiangrass · Little bluestem · Switchgrass · Purple coneflower · Compass plant
Frequently asked questions
In a diverse CRP mix, 2–4 PLS lb per acre is standard. For a monoculture forage or biomass planting, 6–8 PLS lb per acre. Always order by Pure Live Seed pounds, not bulk pounds.
Dormant seeding November through March is the most reliable window across the Midwest. Spring seeding into a firm seedbed is possible through early May, but weed competition is higher.
Expect a slow, root-focused first year, visible tillering in year two, and a mature stand by year three. Do not judge stand success until the end of year two.