How to Grow Westringia Rosemary
Westringia Rosemary
Westringia glabra
shrubWestringia glabra is a compact, evergreen Australian native shrub with needle-like foliage and delicate white, pink, or purple flowers. It forms a dense, rounded habit and is valued for its attractive appearance, drought tolerance, and low maintenance requirements. The plant is particularly suited to Mediterranean and warm temperate gardens.
When should you plant Westringia Rosemary in your zone?
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Example Westringia Rosemary timeline · Pittsburgh, PA (Zone 6b)
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Plant Westringia Rosemary
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Westringia Rosemary
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 9-11; tolerates zone 8b with protection
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Establishment
2-4 monthsYoung transplant developing root system; initial foliage growth is sparse
Water regularly but allow soil to dry between waterings. Protect from extreme heat and wind. Apply light mulch around base, keeping it away from stem.
Vegetative Growth
6-12 monthsRapid foliage development with needle-like green leaves arranged along stems; plant fills out horizontally and vertically
Maintain consistent but not excessive watering. Light feeding with balanced or low-nitrogen fertilizer in spring. Prune lightly to encourage bushiness if desired.
Flowering
Several months (spring through early summer, often extending to fall)Small, delicate flowers appear in clusters along stems; flowers may be white, pale pink, or purple depending on variety
Deadhead spent flowers to encourage continued blooming. Reduce nitrogen fertilizer. Maintain moderate water levels. Avoid heavy pruning during peak flowering.
Mature Shrub
Indefinite; plants live 10+ yearsFully developed plant with dense, rounded form reaching 3-5 feet tall and wide; continuous or repeat flowering throughout warm months
Minimal fertilizer needed; foliage yellowing may indicate overwatering. Prune after flowering to maintain shape and size. Water only during drought periods.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water to dislodge; use horticultural oil or neem oil for severe infestations; ensure adequate air circulation
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Remove affected branches; treat with horticultural oil during dormant season; prune to improve air flow
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Spray undersides of leaves with insecticidal soap; introduce beneficial insects like ladybugs
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Improve drainage; reduce watering; remove and replace affected soil; consider fungicide drench if caught early
Uses
Ornamental Landscape & Cut Flowers
HouseholdWestringia glabra serves as an attractive specimen or hedge plant in dry gardens, coastal areas, and Mediterranean-style landscapes. Its delicate flowers and fine foliage make attractive, long-lasting cut arrangements for indoor displays. [source]
Pollinator Attraction
WildlifeThe delicate flowers attract bees, butterflies, and other beneficial pollinators throughout the growing season, supporting local ecosystems and promoting garden biodiversity. [source]
Low-Maintenance Xeriscaping
HouseholdIts exceptional drought tolerance and minimal water requirements make it ideal for water-conserving gardens, sustainable landscaping, and regions with limited water availability. [source]
Dried Flower Arrangements
CraftDelicate sprigs dry well and can be used in dried floral arrangements, wreaths, and craft projects, maintaining color and form for extended periods. [source]
Harvest Tips
This is an ornamental shrub, not harvested for food. Stems can be cut for fresh arrangements; harvest in morning when flowers are fresh. Prune selectively year-round to remove dead wood and maintain shape; heavy pruning is best done after flowering.
Fun Facts
- 🌱 Westringia glabra is native to southeastern Australia and is commonly called 'Westringia Rosemary' because of its resemblance to true rosemary, though it is not a member of the Rosmarinus genus.
- 🌱 The genus Westringia includes over 25 species, most endemic to Australia, and many are valued as drought-tolerant ornamentals in Mediterranean and warm temperate regions worldwide.
- 🌱 This shrub is particularly popular in California, the Mediterranean basin, and other regions with similar climates due to its combination of aesthetic appeal and water conservation qualities.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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