How to grow tea tree
Overview
Tea tree (Melaleuca alternifolia) is a fast-growing Australian native shrub or small tree, valued for its fine, aromatic foliage and papery bark. It provides soft texture and reliable structure in the garden, often serving as a linking plant between bolder features. Key to success is ensuring well-drained soil and full sun.
Varieties
- Melaleuca alternifolia — The standard tea tree, widely grown for essential oil production and ornamental use.
- Melaleuca alternifolia 'Silver Sheen' — A compact form with silvery-grey foliage, ideal for smaller gardens.
Soil Preparation
Tea tree prefers slightly acidic to neutral soil (pH 5.5–7.0) and well-drained sandy loam. If soil is heavy clay, amend with coarse sand and gypsum. Avoid rich compost or high-phosphorus fertilisers, which can harm native plants.
Growing Guide
Plant tea tree in a position with full sun and well-drained soil; it tolerates light clay but prefers sandy loam. Space plants 1–2 m apart for a dense screen or 3–4 m for specimen growth. Dig a hole twice the width of the root ball, backfill with native soil, and water in deeply. Avoid planting in low spots that stay wet. Mulch with organic material, keeping it clear of the trunk to prevent rot.
Sowing
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Care
Feed with a low-phosphorus native fertiliser in early spring and again in late summer. Prune lightly after flowering to maintain shape and encourage bushiness. Mulch well to keep roots cool and moist, but avoid wetting the trunk.
Companion Planting
Tea tree pairs well with other Australian natives like grevillea, callistemon (bottlebrush), and leptospermum. Avoid planting near heavy feeders like citrus or vegetables, as tea tree prefers low-phosphorus conditions. It also benefits from being underplanted with native groundcovers such as scaevola or myoporum.
Common Pests & Risks
Scale insects can appear on stems and leaves; treat with horticultural oil or neem spray. Myrtle rust (Puccinia psidii) causes orange pustules on new growth; prune affected parts and apply a registered fungicide. Maintain good air circulation to reduce disease risk.
Harvesting
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In the Kitchen
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Troubleshooting
Yellow leaves: often caused by waterlogged soil or iron deficiency; improve drainage and apply iron chelate. Brown leaf tips: usually from salt burn or dry conditions; flush soil with fresh water and increase watering. Sparse growth: indicates too much shade; move to full sun. Myrtle rust: orange pustules on new growth; prune and treat with fungicide.