How to Grow Westringia Rosemary
Wikimedia Commons
Westringia Rosemary
Westringia longifolia
shrubWestringia longifolia is an evergreen Australian shrub known for its needle-like foliage and delicate pale blue to lavender flowers that bloom prolifically throughout the year. This drought-tolerant, low-maintenance plant resembles rosemary in appearance and growth habit, making it an excellent ornamental choice for Mediterranean-style gardens and coastal landscapes.
When should you plant Westringia Rosemary in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Westringia Rosemary timeline · Pittsburgh, PA (Zone 6b)
-
Plant Westringia Rosemary
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
Harvest Westringia Rosemary
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Westringia Rosemary dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 9-11; frost-tender in cooler climates
Sign up free to see if Westringia Rosemary grows in your zone — and get a personalized planting timeline.
Get my Westringia Rosemary timeline →Growth Stages
Establishment
6-8 weeksYoung transplants with developing root systems and compact upright growth
Water regularly to establish roots for first 6-8 weeks. Avoid transplanting shock by acclimating to full sun gradually. Protect from harsh winds if in exposed locations.
Vegetative Growth
6-12 monthsRapid stem and foliage expansion with dense, fine needle-like leaves forming the characteristic upright rounded silhouette
Minimal pruning needed; pinch tips to encourage bushiness if desired. Fertilize lightly in spring with balanced slow-release fertilizer. Water during extended dry periods.
Flowering
Almost continuous in zones 9-11Small pale blue, purple, or white flowers appear along stems in profusion; blooms nearly year-round in warm climates
Continue regular watering and light feeding. Remove spent flowers to encourage continuous blooming (deadheading). Flowers are attractive to pollinators.
Maintenance
OngoingMature shrub maintains dense foliage and steady bloom production with minimal inputs
Prune lightly after flowering or in late winter to maintain shape. Cut back leggy stems to rejuvenate. Established plants need little water or fertilizer; reduce both substantially.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Spray with water to dislodge; apply horticultural oil if severe. Improve air circulation around plants.
-
Prune affected branches; spray with neem oil or horticultural oil in early morning or late evening.
-
Use yellow sticky traps; spray with insecticidal soap or neem oil if population is high.
-
Ensure well-draining soil; reduce watering; improve air flow. Remove and discard heavily affected plants.
Uses
Culinary Herb Substitute
CulinaryWestringia has been used as a rosemary substitute in some Australian and Mediterranean cuisines, with a mild herbal flavor. The needle-like foliage and growth habit make it similar to rosemary and can be used to flavor dishes. [source]
Ornamental Landscaping
HouseholdHighly valued as a landscape shrub for Mediterranean, coastal, and xeriscape gardens. The delicate year-round blooms and fine foliage create visual interest with minimal maintenance. [source]
Pollinator Support
WildlifePale blue and purple flowers attract bees, butterflies, and other beneficial pollinators throughout the year, making it excellent for wildlife gardens and supporting local ecosystems. [source]
Floral Arrangements
HouseholdFresh or dried sprigs with delicate flowers are prized for cut flower arrangements and floral design, adding texture and color to bouquets. [source]
Dried Flower Crafts
CraftStems dry well and can be used in dried flower arrangements, wreaths, and botanical crafts, maintaining color and form for extended periods. [source]
Harvest Tips
This ornamental shrub is not typically harvested. However, fresh sprigs can be cut for arrangements or as a rosemary substitute in some culinary applications. Cut stems in morning when foliage is crisp; use sharp pruning shears to encourage bushier regrowth.
Fun Facts
- 🌱 Westringia longifolia is native to eastern Australia and is named after being discovered along riverbanks, thriving in well-drained conditions similar to its natural habitat.
- 🌱 This shrub is sometimes called 'Australian Rosemary' in the ornamental plant trade, though it is not related to true rosemary (Rosmarinus officinalis); it belongs to the mint family Lamiaceae.
- 🌱 The plant can bloom nearly 365 days a year in ideal warm climates, making it one of the longest-flowering ornamental shrubs available for Mediterranean and coastal gardens.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Westringia Rosemary planting timeline
Tell us your zip code and we'll calculate exactly when to start Westringia Rosemary seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Westringia Rosemary timeline →