Cape rush

Sun

Full sun; tolerates light shade, but usually grows less densely.

Water

Water regularly while establishing. Established plants tolerate some dry weather, but look better with occasional deep watering during prolonged drought.

Soil

Well-drained sandy or loamy soil, preferably acidic to neutral. Tolerates moist ground provided it is not stagnant or persistently waterlogged.

Height

3-5 ft (0.9-1.5 m)

Spread

3-5 ft (0.9-1.5 m)

Flowers

Small brown flower heads at the stem tips, mainly in summer; male and female flowers occur on separate plants.

Foliage

Evergreen. Slender, jointed green stems with dark brown, papery sheaths at the nodes. True leaves are reduced to small scales.

Growth

Moderate

Care needed

Low

• Deer resistant
• Drought tolerant
• Heat tolerant
• Wildlife

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

Difficulty

Moderate

Toughness

Needs looking after

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

1. Planting day

   1 ft (0.3 m)

2. After 1 year

   2 ft (0.6 m)

3. After 2 years

   3 ft (0.9 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

Growth rate

Moderate

• Water deeply during the first growing season, allowing the surface soil to begin drying between waterings.
• Give established clumps occasional deep watering during long dry spells.
• Feed sparingly in spring with a low-phosphorus fertiliser; avoid heavy feeding.
• Apply a light mulch around the clump, keeping it clear of the stem bases.
• In colder climates, grow it in a container and move it into bright, frost-free shelter for winter.

Pruning. In spring, cut dead or damaged stems individually at ground level. Do not shear the clump or cut all stems down as you would an ornamental grass; old stems do not regrow from their cut ends.

Spring

Plant after the risk of hard frost has passed, leaving room for the mature clump.

Spring

Remove dead stems at the base and apply a light, low-phosphorus feed if growth is weak.

Summer

Water new plants regularly and established plants during prolonged dry spells.

Autumn

Check drainage and clear fallen leaves from the crown.

Late autumn

Move container plants under bright, frost-free cover where winters are colder than the plant can tolerate.

Winter

Keep sheltered container plants barely moist rather than wet.

• Repeat clumps through a gravel garden for a consistent, fine-textured structure.
• Use beside a pond or water feature, planting above the permanently saturated margin.
• Grow in a large container to soften paving, walls and modern architecture.
• Combine with bold-leaved plants such as agapanthus for a contrast in texture.
• Plant in mild coastal gardens where its moving stems complement low shrubs and open views.

Garden styles it suits: Architectural minimal, Contemporary minimal, Coastal, Dry gravel garden, South African fynbos and Winter interest.

Plant it with: Agapanthus, Kangaroo paw, New Zealand flax, Leucadendron, African daisy and Society garlic.

Wildlife: Dense clumps provide shelter for small garden animals and invertebrates. Flowers are wind-pollinated and are not a significant nectar source.

• Frost damage: stems may brown after freezing weather; protect container plants and remove damaged stems once spring growth begins.
• Root or crown rot in stagnant soil: improve drainage, avoid burying the crown and reduce watering during cool weather.
• Brown tips during drought: water deeply and mulch around, rather than over, the crown.
• Poor recovery after hard pruning: remove only individual dead stems rather than cutting the whole clump down.

Not known to be toxic to people, cats, dogs or horses. Species-specific information is limited, so do not treat any part as edible or encourage pets to chew it.

• Large Cape rush (Elegia elephantina)

  A much larger, coarser plant with thicker stems, often reaching 6-8 ft (1.8-2.4 m). It has frequently been sold under the name Chondropetalum tectorum.

• Horsetail restio (Elegia capensis)

  Has conspicuous tiers of fine, branching green shoots around the main stems, giving a feathery appearance; Cape rush has largely unbranched stems.

The species name tectorum means 'of roofs', referring to the traditional use of its stems for thatching.

Propagation. Raise from seed, which can germinate unevenly and often responds to smoke treatment. Established clumps can be divided carefully in spring, but divisions are slow to recover; keep substantial roots and several healthy stems on each piece.

Accepted botanical name

Elegia tectorum

Native range

Cape Provinces.

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