Alkali sacaton

Sun

Full sun.

Water

Water regularly while establishing; once rooted, water deeply during prolonged drought. Established plants tolerate dry ground and occasional brief flooding.

Soil

Tolerates sandy, loamy and clay soils, including saline and alkaline ground. Avoid sites that remain waterlogged through winter.

Height

3-5 ft (0.9-1.5 m), including flower stems

Spread

2-3 ft (0.6-0.9 m)

Flowers

Summer into early autumn; fine pinkish to purplish flowers form broad, airy panicles that fade to tan.

Foliage

Narrow, arching, blue-green to grey-green blades form a dense basal clump and turn straw-coloured in autumn.

Growth

Moderate; growth starts late in spring as the soil warms.

Care needed

Low

• Deer resistant
• Drought tolerant
• Cold hardy
• Heat tolerant
• Wildlife

Northern hemisphere months. In Australia, shift them by six.

Difficulty

Easy

Toughness

Very tough

Pick your zone, country, light and whether you have pets.

1. Planting day

   1.1 ft (0.35 m)

2. After 1 year

   2.3 ft (0.69 m)

3. After 2 years

   3 ft (1 m)

4. After 3 years

   4 ft (1.2 m)

   full size

About 3 years to full size.

From a typical nursery size, at an average rate for this kind of plant. A rule of thumb, not a forecast.

Cats and dogs

Safe

Native to

the US and Canada

Growth rate

Moderate

• Plant in full sun after the soil has warmed, allowing room for the mature clump.
• Water deeply during the first growing season, letting the surface soil dry between waterings.
• Once established, water only during extended dry spells unless the plant shows persistent drought stress.
• Avoid routine feeding; rich soil and excess nitrogen can produce floppy growth.
• Keep mulch clear of the crown and divide crowded clumps in spring when fresh growth begins.

Pruning. Leave dry foliage and seed heads standing through winter. In late winter or early spring, before new shoots extend, cut the old growth to 4-6 in (10-15 cm) above the ground.

Late winter

Cut back standing stems before fresh growth begins.

Spring

Check crowns for winter damage; do not assume plants are dead before warm-season growth starts.

Late spring

Plant or divide once the soil is warm, and water new plants thoroughly.

Summer

Water establishing plants deeply; check mature clumps only during prolonged drought.

Early autumn

Collect ripe seed if wanted, or remove flower heads before seed falls where seedlings would be unwelcome.

Late autumn

Leave the tawny foliage standing for winter structure and wildlife cover.

• Plant in broad drifts in dry meadow schemes, where the fine flower heads soften stronger plant shapes.
• Combine with yuccas and other bold-leaved plants in gravel gardens for contrasting textures.
• Use in sunny saline or alkaline beds where less tolerant ornamentals struggle.
• Place beside paths or terraces where low sunlight can illuminate the airy seed heads.

Garden styles it suits: Native meadow, New perennial (prairie), Desert / xeriscape, Dry gravel garden, Southwestern and Winter interest.

Plant it with: Blue grama, Little bluestem, Purple prairie clover, Prairie coneflower, Butterfly weed and Banana yucca.

Wildlife: Seeds provide food for seed-eating birds, while dense clumps offer shelter for insects and other small animals. Like other grasses, it is wind-pollinated rather than a nectar source for bees.

• Crown rot in persistently wet soil: improve drainage or move the plant to a raised, better-drained position.
• Flopping in shade or over-rich soil: provide full sun and stop nitrogen feeding.
• Weak flowering in cool summers: choose the warmest sunny site available; reliable flowering may not be possible in cool maritime conditions.
• Unwanted seedlings on open ground: remove seed heads before they shed and pull seedlings while small.

Not known to be toxic to people, cats, dogs or horses; no part is generally regarded as poisonous. It is also used as a forage grass, although garden plants should not be assumed safe to eat if treated with chemicals.

• Giant sacaton (Sporobolus wrightii)

  Usually forms a much taller, coarser clump, often reaching 6-8 ft (1.8-2.4 m) in flower, with larger leaves and more imposing flower stems.

• Prairie dropseed (Sporobolus heterolepis)

  Makes a lower, rounded mound of much finer, hairlike green leaves; its flowers often have a distinctive coriander-like scent.

The common name refers to its tolerance of alkaline soils, while sacaton comes from the Spanish zacatón, meaning a large or coarse grass.

Propagation. Sow seed shallowly in spring once conditions are warm, keeping the seedbed moist until seedlings establish. Divide established clumps in spring as active growth begins; large crowns can be tough to split.

Accepted botanical name

Sporobolus airoides

In the US and Canada

Native in Canada and the lower 48 states.

Native range

Arizona, Arkansas, British Columbia, California, Colorado, Idaho, Kansas, Mexico Northeast, Mexico Southwest, Missouri, Montana and Nebraska.

Measured

Soil pH 6.6 to 9.

Sources: GBIF (CC BY 4.0), USDA PLANTS and Trefle (CC BY 4.0). The care and design notes are LandscapeGPT's own.