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How to Grow Olearia stellulata

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Olearia stellulata

Olearia stellulata

shrub

Olearia stellulata, commonly known as Starry Daisy Bush or Tanzanite Daisy Bush, is a compact evergreen shrub native to southeastern Australia. It produces delicate, star-shaped white to pale mauve flowers with yellow centers that bloom prolifically in spring and early summer. This attractive ornamental shrub is valued for its fine foliage, graceful habit, and abundant floral display in temperate gardens.

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Example Olearia stellulata timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Olearia stellulata

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Olearia stellulata

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Olearia stellulata dates for your own zip code.

Growing Conditions

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Sun: Full sun to partial shade; 6+ hours of direct sunlight daily for best flowering
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Water: Moderate water needs; drought-tolerant once established. Water regularly during first growing season and establishment period. Reduce watering in winter. Avoid waterlogging; allow soil to dry between waterings.
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Spacing: 36 inches
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Days to maturity: Not applicable for ornamental; reaches mature size in 2-3 years
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Planting depth: Plant at same depth as root ball; do not bury the crown

Soil

Type: Well-draining sandy loam or gravelly soil
pH: 6.0-7.0
Amendments:
Coarse sand or gravel for drainage Compost or aged organic matter Avoid heavy clay soils

Growing Zones

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Thrives in zones 8b-10a; prefers mild, temperate climates

8b 9a 9b 10a

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Growth Stages

1

Establishment

3-6 months

Young transplant with initial root development and foliage adjustment to garden conditions

Water regularly; provide shelter from strong winds; mulch around base; avoid fertilizer until established

2

Vegetative Growth

6-12 months

Plant develops fuller branching structure and finer foliage; no flowering yet

Water moderately; pinch tips if needed to encourage bushiness; minimal pruning required

3

Pre-flowering

4-8 weeks

Visible flower buds form at branch tips; plant continues to fill out

Maintain consistent watering; avoid overfertilizing; light pruning after flowering to shape

4

Flowering

8-12 weeks

Abundant star-shaped white to pale mauve flowers with golden centers cover the shrub

Continue moderate watering; deadhead spent flowers to encourage extended blooming; provide afternoon shade in very hot climates

5

Post-flowering & Rest

Variable, extends into winter

Flowers fade; plant enters period of slower growth; foliage remains ornamental

Light pruning to maintain shape and size; reduce watering gradually; minimal fertilizer needed

Companion Planting

Plan your garden →

Plant with:

Westringia Leptospermum Acacia Grevillea Salvia Lavender Rosemary

Avoid planting near:

Plants preferring heavy clay soils Moisture-loving plants requiring constant wetness Species competing for nutrients in poor soils

Common Pests

  • Increase humidity; spray with water to dislodge; use miticide if severe; improve air circulation

  • Prune heavily infested branches; apply dormant oil spray in winter; hand-remove visible scales

  • Improve air circulation; avoid overhead watering; apply sulfur-based fungicide; plant in full sun

  • Remove affected leaves; improve drainage; avoid wetting foliage; apply copper fungicide if needed

Uses

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Decorative Landscape Shrub

Ornamental

Olearia stellulata serves as an excellent accent plant, mass planting specimen, or informal hedge in temperate gardens. Its abundant starry flowers and fine evergreen foliage add year-round structure and spring-summer color with minimal maintenance. [source]

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Cut Flower Arrangements

Household

Fresh sprigs of flowering branches are attractive in floral arrangements and bring delicate daisy-like blooms indoors. The fine foliage adds texture and the white-mauve flowers provide soft color contrast. [source]

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Pollinator Attraction

Wildlife

The abundant star-shaped flowers attract bees, butterflies, and other pollinators, making it valuable for supporting beneficial insects in the garden. The shrub's blooming period provides important spring-summer nectar sources. [source]

Harvest Tips

Not typically harvested. For ornamental purposes, deadhead spent flowers throughout bloom period to encourage continued flowering and maintain neat appearance. Cut branches can be used in floral arrangements when flowers are fresh.

Fun Facts

  • 🌱 Olearia stellulata is native to southeastern Australia, where it thrives in well-drained coastal and woodland habitats
  • 🌱 The genus Olearia contains over 130 species, mostly native to Australia and New Zealand, many valued as ornamental shrubs
  • 🌱 Its common name 'Starry Daisy Bush' refers to the shape of its flowers, which resemble tiny daisies with delicate, star-like petals

Gardening Terms

New to gardening? Learn about terms used in this guide:

Deadhead Full Sun Mulch Partial Shade Transplant
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