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
Firm, well-drained loam.
6.0–7.0
A modest nitrogen source in spring for wheat/rye; teff and rice prefer more.
Watering
1 in per week during establishment. Most small grains are drought-tolerant once headed out.
Overhead is fine. Rice paddies are the exception — constant flood.
Overwatered: lodging (flopped stems), rust. Underwatered: short heads, shriveled grain.
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
60–80°F (15–27°C)
40–65°F (4–18°C)
Winter grains (winter wheat, rye, spelt) overwinter through hard freezes. Spring grains and teff are frost-tender.
Container growing
Not recommended in containers
Grains need broadcast area — even a 10x10 ft patch yields a meaningful loaf's worth of flour.
Detailed harvesting
Cut whole stalks with a sickle or hedge shears when heads are straw-dry and grain dents but doesn't smash. Shock or hang to cure 1–2 weeks.
Post-harvest storage & preservation
Thresh in a pillowcase or against a screen; winnow chaff in front of a fan. Store cool and dry in sealed jars. Freeze 3 days to kill any weevils.
Culinary, medicinal & other uses
Bake, brew, mill for flour, sprout, or add to grain bowls. Straw is mulch or bedding.
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
Most grains self-pollinate before the head fully emerges.
20 ft between varieties is enough for most.
The grain IS the seed — save cleaned kernels from your best-headed plants for next year.
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.
From your kitchen — grow andropogon ternarius from what you already have
Save whole ripe heads — grains are just grasses gone to seed.
- 1Harvest heads when they're straw-tan and the grain is hard (bite test: dents, doesn't smash).
- 2Cut whole stalks with 6 in of straw and shock or hang to cure 1–2 weeks.
- 3Thresh by rubbing heads inside a pillowcase or against a screen.
- 4Winnow by pouring in front of a fan; store cool and dry.
Storage: 2–4 years — grain seed loses vigor faster than most.
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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