How big does Prairie dropseed grow?

About 80 cm × 75 cm after ten years (height × width). Its ultimate size is 60–90 cm × 60–90 cm.

What soil does Prairie dropseed grow in?

It tolerates these soils: average garden soil, sandy, clay, calcareous.

Is Prairie dropseed hardy?

Hardy down to -40 °C (USDA zone 3, RHS H7). It gets through winter in every part of the country.

When does Prairie dropseed flower?

Flowering: July–October, pink, bronze.

How much water does Prairie dropseed need?

Water need: low. Drought tolerance: high.

Prairie dropseed

Sporobolus heterolepis

Prairie dropseed (Sporobolus heterolepis) is an ornamental grass that reaches 80 cm × 75 cm after ten years. Light: full sun, part shade. Hardy down to -40 °C. Drought tolerance: high.

Illustration of Prairie dropseed — An illustration of the typical shape of the mature plant, not a photo.

What it's good for, and what it isn't

Prairie dropseed is one of the finest North American prairie grasses: its hair-fine, glossy green leaves form a dense, arching mound, and in late summer and autumn airy pinkish-brown flower sprays float above it with a pleasant scent often likened to buttered popcorn. It turns orange in autumn and stands up to snow, so it stays attractive through winter, and it suits sunny, dry borders, prairie-style plantings, gravel gardens and mass planting as a ground cover. It is slow to settle in, so give it room and keep weeds down for the first two or three years; after that it is a long-lived, tough grass that copes with drought and with heavy or limy soil.

Watch out for

It is very slow to establish: in the first year or two it barely grows, and fast neighbours and weeds can easily smother it. As a warm-season grass it starts late in spring, so do not give up on it if it still looks dead in April. In shade or very rich, fertilised soil it grows weaker and the clump can flop open, and it dislikes standing water. Seed is hard to germinate, so plants are raised by division, and it hardly self-seeds in gardens.

Key facts

Light: Full sun, Part shade
Water need: Low
Care: Low
Size after 10 years: 80 cm × 75 cm
Hardiness: down to -40 °C
Foliage: Deciduous
Flowering: J F M A M J J A S O N D July–October, pink, bronze

Group	Ornamental grass
Light	Full sun, Part shade
Size after 10 years	80 cm × 75 cm
Ultimate size	60–90 cm × 60–90 cm
Hardiness	down to -40 °C (USDA 3, RHS H7)
Soil	Average garden soil, Sandy, Clay, Calcareous
Foliage	Deciduous
Flowering	July–October, pink, bronze
Water need	Low
Drought tolerance	High
Maintenance	Low
Root aggressiveness	Low
Suckering	no data
Spreading	Low
Distance from buildings	no data
Distance from paving	no data
Litter	not typical
Planting distance	60 cm
For dogs	no data
For cats	no data
For children	no data
Typical price	no data

Toxicity data is for information only. If your pet or child has eaten a plant, contact a vet or a doctor.

Frequently asked questions

Data updated: October 19, 2026 · How our data is made

Appears in these lists

Ground cover plants Drought-tolerant plants Drought-tolerant plants for sandy soil Ornamental grasses Fragrant plants Plants with autumn colour Ornamental grasses with autumn colour

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