Twiggy heath myrtle

Sun

Full sun to light partial shade; flowering and growth are denser in sun.

Water

Water regularly while establishing. Once established, water deeply during prolonged dry spells; avoid keeping the roots permanently saturated.

Soil

Moist but well-drained soil, preferably slightly acidic to neutral. Tolerates sandy soil and loam, and clay where drainage is adequate.

Height

6-12 ft (1.8-3.7 m)

Spread

4-8 ft (1.2-2.4 m)

Flowers

Small white, five-petalled flowers in clusters, mainly in summer and sometimes into early autumn; timing varies with climate.

Foliage

Evergreen. Small, narrow, opposite green leaves on slender branches; aromatic when crushed.

Growth

Moderate to fast in mild conditions with adequate moisture.

Care needed

Low

• Pollinators
• Heat tolerant
• Wildlife
• Low allergen

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

Difficulty

Moderate

Toughness

Fairly tough

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

1. Planting day

   1.6 ft (0.5 m)

2. After 1 year

   3 ft (1.1 m)

3. After 2 years

   5 ft (1.6 m)

4. After 3 years

   7 ft (2.2 m)

5. After 5 years

   9 ft (2.8 m)

   full size

About 4 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

Fast

• Water deeply through the first growing season, allowing the surface soil to begin drying between waterings.
• Spread organic mulch over the root area, keeping it clear of the stems.
• Feed lightly in spring only if growth is weak; avoid heavy feeding.
• Give container plants drainage holes and shelter from freezing winds.
• Protect young plants from frost and avoid exposed frost pockets.

Pruning. Lightly trim after flowering to encourage branching and maintain an informal outline. Remove dead or damaged branches in spring; avoid cutting the whole shrub back into bare old wood.

Spring

Plant after the risk of damaging frost has passed and water thoroughly.

Spring

Remove winter-damaged shoots once new growth shows which wood is alive.

Late spring

Refresh mulch and check that it does not touch the stems.

Summer

Water young plants and containers during dry weather; give established shrubs a deep watering during prolonged drought.

Late summer

After the main flowering flush, lightly trim if shaping is needed.

Autumn

Move container plants under bright, frost-free cover before freezing weather.

• Use as an informal flowering hedge or light screen in a mild-climate garden.
• Place behind lower shrubs and grasses, where its fine foliage provides a soft backdrop.
• Combine with other Australian shrubs in a sunny, well-drained border.
• Grow in a large container on a sheltered patio where winter protection is practical.

Garden styles it suits: Australian native, Coastal, Wildlife garden, Pollinator garden, White garden and Low-maintenance.

Plant it with: Westringia, Dwarf bottlebrush, Lomandra, Flax lily and Correa.

Wildlife: The flowers attract bees and other flower-visiting insects. Dense branching provides shelter for small garden wildlife.

• Root rot in persistently wet soil: improve drainage and reduce watering; avoid planting in low spots that remain saturated.
• Frost damage to shoots: choose a sheltered position, protect young plants and remove dead growth after frost risk has passed.
• Sparse growth in deep shade: move young plants to a sunnier position and trim lightly after flowering.
• Drying out in containers: check moisture frequently in warm weather and water the whole rootball thoroughly.

Not known to be toxic to people, cats, dogs or horses, but species-specific safety information is limited. No particular part is established as poisonous; this is not an edible plant, and deliberate ingestion should be avoided.

• Tick bush (Kunzea ambigua)

  Its white flowers look fluffy because the long stamens project prominently beyond the petals; twiggy heath myrtle has more clearly visible, open five-petalled flowers.

• Mānuka (Leptospermum scoparium)

  Usually has larger individual flowers, stiff, often prickly leaves arranged alternately, and conspicuous woody seed capsules. Twiggy heath myrtle has small opposite leaves and much smaller flowers.

The Latin epithet virgata means twiggy or wand-like, referring to the slender branches.

Propagation. Take semi-ripe cuttings from healthy, non-flowering shoots in summer, using a free-draining propagation mix and humid conditions. Seed is another option, but cuttings are more practical for reproducing a particular garden plant.

Accepted botanical name

Sannantha virgata

Native range

New Caledonia.

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