Andropogon ternarius
Also known as: Paintbrush Bluestem · Silver Bluestem · Split Bluestem · Splitbeard Bluestem
When & where
Germination
Spacing & depth
How to plant
Sow seed shallowly on firm, moist soil. Press in lightly and keep evenly moist until seedlings establish.
Grower's tip
Named for its silvery, split seed heads that catch the light. A beautiful native grass for dry, sandy soils and prairie restoration.
Soil preferences
Almost any free-draining soil; most ornamental and prairie grasses prefer it lean.
5.5–7.5
None needed. Rich soil makes clumps flop.
Watering
Water through establishment, then only in extended drought.
Soak the root zone; overhead is fine on grasses.
Overwatered: floppy, splayed clumps. Underwatered: browning tips, early dormancy.
Prefers top-watering — Top-water (overhead sprinkler or rain) is the norm — grains are wind-pollinated and tolerate wet foliage well. Rice grows in standing water. Bottom-watering isn't practical for broadcast grain patches.
Temperature tolerance
Broad — warm-season grasses want 75–95°F, cool-season 60–75°F
Down to the species' rated zone minimum
Most perennial grasses go dormant with frost and return from the crown.
Container growing
Possible with the right cultivar
5–15 gal (19–57 L) for ornamental clumps
Clumping types behave in pots; running types will escape any bed you give them.
Detailed harvesting
Cut ornamental clumps back to 4–6 in (10–15 cm) in late winter, before new shoots emerge. Leave the winter structure standing until then.
Post-harvest storage & preservation
Dry seed heads upside down in a paper bag for arrangements or re-sowing.
Culinary, medicinal & other uses
Movement and winter structure, erosion control, meadow and prairie planting, wildlife cover.
Medicinal or traditional uses are shared for interest only — this is not medical advice. Consult a qualified professional before using any plant medicinally.
Seed saving
Wind-pollinated — expect crossing between nearby species.
Not practical outdoors.
Strip ripe seed heads into a bag once they shatter easily, then dry and clean.
Your zone's planting calendar
Pick your USDA hardiness zone and we'll estimate the key dates for andropogon ternarius in your area. These are regional averages — always check your own last-frost forecast before sowing.
My Andropogon ternarius notes
Andropogon ternarius seeds on hand
Track packets and loose seeds you already have. Private to your account.
Par level — leave at 0 for no alert. Anything below par shows on Seed Starting and your shopping list.
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