perennialN. America Native

Yellow Star-Grass

The Story

Plant Bio

Hypoxis hirsuta is a small, tufted perennial native across eastern and central North America, forming low clumps of narrow, grass-like leaves covered in fine pubescence. Bright yellow, six-petaled star-shaped flowers open on slender scapes in full sunlight from spring into early summer.

The species relies on a subterranean corm that stores energy and enables survival through dry spells and periodic fires. Fine hairs coat the narrow leaf blades and flower stalks, setting its texture apart from true ornamental grasses.

Uses & Benefits:

Produces yellow star-shaped flowers above textured, grass-like leaves suitable for rock gardens and native borders.

Survives drought conditions due to subterranean energy reserves stored in its corm.

Provides pollen and nectar for native short-tongued bees, small butterflies, and beneficial insects.

Essentials

At a Glance

Plant Type

Perennial

Height

10"

Width

16"

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9

Water

Low to Medium

Humidity

Moderate

Lifespan

Perennial

Native To

North America

Toxicity

Non-toxic

Bloom period

Spring – Early summer

In flower about 4 months of the year

Planting

How to Grow

Select a site receiving at least three to six hours of direct sunlight in lean, acidic to neutral, gritty soil.
Plant subterranean corms 1 to 2 inches deep, spacing plants 8 to 12 inches apart.
Water lightly after planting to settle the soil around the corms without oversaturating.
Allow the top layer of soil to dry out between waterings while young roots establish.

Pro Tip

Plant in lean, gritty, well-draining soil and avoid root disturbance once established; placing this species in heavy loam or moisture-retentive beds leads rapidly to corm rot.

Keep It Thriving

Care Guide

Do

Ensure excellent soil drainage by amending heavy areas with coarse sand or fine gravel.
Position in full sun for maximal flower expansion.
Remove dead foliage in late winter before new growth emerges.

Don't

Do not plant in heavy, wet clay soils that retain winter moisture.
Avoid high-nitrogen fertilizers, which cause weak leaf growth at the expense of flowers.
Do not excessively disturb established corm clumps.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Divide
Pest Check
Prune
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Rock gardensNative plant restorationPrairie plantingsBorder edgingContainer displays

Companion Plants

Echinacea purpurea Asclepias tuberosa Sisyrinchium angustifolium Schizachyrium scoparium

Multiply

Propagation Methods

Good to Know

Common Questions

Yellow Star-Grass questions

What zones can Yellow Star-Grass grow in?

Yellow Star-Grass is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Yellow Star-Grass deer resistant?

Not reliably. Deer may browse Yellow Star-Grass, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Yellow Star-Grass bloom?

Yellow Star-Grass typically blooms in spring through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Yellow Star-Grass need full sun?

Yellow Star-Grass does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Yellow Star-Grass drought tolerant?

Yes — once established (usually after the first full season), Yellow Star-Grass handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.