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Andropogon virginicus

Grass
Warm season perennial grass
Full sun

Also known as: Broom Sedge · Broom-sedge · Broomsedge Bluestem

When & where

Season
Warm season perennial grass — blooms late summer to fall
USDA zones
Hardy zones 5–9
Sun
Full sun
Start indoors
6–8 weeks before last frost
Direct sow outdoors
Spring after last frost or dormant fall seeding
Days to harvest
Not applicable — ornamental / prairie grass

Germination

Germination time
14–28 days
Soil temperature
70–75°F (21–24°C)

Spacing & depth

Sow depth
1/4 in (6 mm)
Seed spacing
Sow thinly; do not cover deeply
Mature plant spacing
12–18 in (30–45 cm)
Row spacing
18 in

How to plant

Sow shallowly on firm, moist soil. Broomsedge thrives in poor, dry soils and improves as a pioneer species over time.

Grower's tip

A common native bunchgrass that turns warm copper-orange in fall. Important for wildlife and erosion control on lean sites.

Soil preferences

Soil type

Almost any free-draining soil; most ornamental and prairie grasses prefer it lean.

pH range

5.5–7.5

Amendments

None needed. Rich soil makes clumps flop.

Watering

Frequency

Water through establishment, then only in extended drought.

Method

Soak the root zone; overhead is fine on grasses.

Over vs. under

Overwatered: floppy, splayed clumps. Underwatered: browning tips, early dormancy.

Top-water or bottom-water?

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

Ideal daytime air temp

Broad — warm-season grasses want 75–95°F, cool-season 60–75°F

Ideal nighttime air temp

Down to the species' rated zone minimum

Frost sensitivity

Most perennial grasses go dormant with frost and return from the crown.

Container growing

Container-suitable?

Possible with the right cultivar

Recommended pot size

5–15 gal (19–57 L) for ornamental clumps

Notes

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

Pollination

Wind-pollinated — expect crossing between nearby species.

Isolation needs

Not practical outdoors.

How to save

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 virginicus in your area. These are regional averages — always check your own last-frost forecast before sowing.

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