Leptospermum petersonii

Lemon-Scented Tea Tree

Botanical Name: Leptospermum petersonii
Family: Myrtaceae
Origin: Eastern Australia (Queensland & northern New South Wales)
Plant Type: Evergreen shrub to small tree

Overview

Well suited to sheltered sites in Adelaide’s Mediterranean climate, Leptospermum petersonii is a graceful Australian native shrub prized for its strongly lemon-scented foliage and masses of small white flowers in spring. While naturally occurring in higher-rainfall regions, it performs reliably in South Australia when planted in well-drained soil with some summer moisture during establishment. Its fine, narrow green foliage releases a distinct lemon aroma when brushed or crushed and may develop soft olive or slightly bronze-tinged tones during dry periods or cooler weather. With its airy habit, aromatic foliage and pollinator appeal, Lemon-Scented Tea Tree is ideal as a feature shrub, informal screen or fragrant planting near paths, entries and outdoor living areas.

Key Features

• Mature Size: 3–5 m H × 2–3 m W (can be maintained smaller with pruning)
• Growth Rate: 30–60 cm per year under good conditions
• Foliage: Fine, narrow green leaves; strongly lemon-scented; may show subtle olive or bronze tints in cool or dry conditions
• Flowers: Masses of small white, lightly cup-shaped flowers in spring, sometimes extending into early summer
  
• Fragrance: Foliage strongly lemon-scented; flowers lightly sweet but subtle
• Seasonal Interest: Evergreen foliage year-round, fresh lemon fragrance with movement or handling, and a bright spring flowering display; foliage colour may soften slightly in winter or during dry summers
• Wildlife Value: Highly attractive to bees, butterflies and other beneficial insects; dense branching provides shelter for small birds
• Tolerance: Moderate drought tolerance once established; heat tolerant with some shelter from extreme hot winds; wind tolerant; suitable for coastal SA in protected positions; light frost hardy when mature
• Planting Density: Screening or informal hedge: 1–1.5 m apart, Feature planting: allow 2–3 m spacing from other shrubs or structures
• Pet Friendly: Generally considered safe, though strong essential oils may cause mild irritation if chewed—discourage ingestion

Where It Works Best

• Sunlight: Full sun to light part shade; best growth and flowering in full sun with some protection from harsh afternoon heat inland
• Soil: Well-drained loam or sandy loam; tolerates slightly heavier soils if drainage is good; avoid prolonged waterlogging
• Water Needs: Establishment: 2 deep soaks/week for 8–12 weeks. Established: deep soak every 10–14 days in summer during dry periods; occasional watering in winter if dry
• Maintenance: Low; light prune after flowering to maintain shape and density; avoid heavy cutting into old wood; mulch annually and apply a light native fertiliser in spring if needed
• Lifespan: 15–30+ years in suitable conditions
• Climate Zones: Best suited to temperate and Mediterranean SA gardens, including Adelaide plains, foothills and sheltered coastal sites
• Soil pH: Neutral to slightly acidic; tolerates mildly alkaline soils with excellent drainage

Landscape & Design Ideas

• Fragrant feature shrub near paths, entries and alfresco areas
• Informal screening or soft hedging in native and mixed gardens
• Pollinator-friendly planting in wildlife and cottage-style gardens
• Light canopy shrub for layered planting with grasses and lower natives
• Coastal and suburban gardens requiring scent and year-round greenery

Why You Will Love It

Leptospermum petersonii brings fragrance, softness and spring brilliance to South Australian gardens. With its lemon-scented foliage, airy form and wildlife appeal, it’s a beautiful, sensory addition to gardens where structure, scent and seasonal flowers are equally valued.