How to grow coprosma
Overview
Coprosma repens is a dense, glossy-leaved shrub native to New Zealand and coastal Australia. It is grown for its tough, colourful foliage and its ability to form a neat, low hedge or fill gaps between bolder feature plants. It thrives in part shade and tolerates salt spray, making it ideal for seaside gardens.
Varieties
- Coprosma repens 'Pink Splendour' — Glossy green leaves with bright pink margins, popular for colour contrast.
- Coprosma repens 'Variegata' — Cream and green variegated leaves, excellent for brightening shady spots.
- Coprosma repens 'Marble Queen' — White and green marbled foliage, very compact for low hedges.
Soil Preparation
Coprosma prefers free-draining, slightly acidic to neutral soil (pH 6.0–7.0). In heavy clay, amend with gypsum and coarse sand. Add a handful of blood and bone or slow-release native fertiliser to the planting hole.
Growing Guide
Plant Coprosma in a position with morning sun and afternoon shade, especially in hot inland areas. Space 60–80 cm apart for a dense hedge, or 1–1.5 m for a specimen. Dig a hole twice the width of the pot, backfill with free-draining soil mixed with compost, and water in well. Do not plant deeper than the root ball. Apply a 5 cm layer of mulch around the base, keeping it off the stem.
Care
Feed with a slow-release native fertiliser in early spring. Prune lightly after flowering to maintain shape and remove frost-damaged tips. Mulch annually to retain moisture and suppress weeds.
Companion Planting
Coprosma pairs well with other coastal shrubs like Westringia fruticosa, Correa alba, and Myoporum parvifolium. Avoid planting near heavy feeders like citrus or vegetables that need frequent watering, as Coprosma prefers drier conditions.
Common Pests & Risks
Scale insects and mites can infest Coprosma, especially in dry or stressed plants. Control scale with horticultural oil in early spring, and mites with a strong water spray or insecticidal soap. Avoid overwatering to prevent root rot.
Troubleshooting
Yellow leaves: overwatering or poor drainage. Reduce water and improve soil. Brown leaf edges: wind burn or salt spray. Shelter with a windbreak or move to a less exposed spot. Leaf drop: frost damage. Wait for warm weather and prune back dead tips. Sparse growth: too much shade. Move to a sunnier position. Mites: dry air or stress. Spray with water or insecticidal soap.