How to grow native mulberry
Overview
Native mulberry (Pipturus argenteus) is a fast-growing rainforest shrub with silvery-green leaves and edible white fruit. It is grown for its ornamental value and modest harvest, and thrives in warm, sheltered gardens with consistent moisture.
Soil Preparation
Prefers slightly acidic to neutral pH (6.0–7.0), well-draining loam enriched with organic matter. Improve heavy clay with compost and gypsum; ensure good drainage to prevent root rot.
Growing Guide
Plant in part-shade with protection from harsh afternoon sun and strong winds. Space 2–3 m apart in well-draining, organic-rich soil. Water regularly to establish, then maintain steady moisture; avoid waterlogging. Mulch deeply to keep roots cool and suppress weeds. Best planted in spring or early summer after frost risk passes.
Sowing
Sow fresh seed 5 mm deep in seed-raising mix, keep warm and moist; germinates in 2–4 weeks. Direct sow in spring or transplant seedlings when 10 cm tall. Seed viability is short, so sow promptly.
Care
Feed with a balanced organic fertiliser in early spring and again after summer rains. Prune lightly after harvest to shape and remove dead wood. Mulch well to retain moisture and suppress weeds.
Companion Planting
Grow alongside other rainforest shrubs like lilly pilly, blueberry ash, and native ginger for a layered, productive understory. Avoid heavy feeders or plants that compete for root space; keep away from eucalypts and acacias that may dry the soil.
Common Pests & Risks
Birds and caterpillars are common; netting can protect fruit from birds, and hand-pick or use organic Bt spray for caterpillars. Watch for scale insects on stems in humid conditions; treat with horticultural oil.
Harvesting
Harvest ripe white fruit when soft and easily detached, typically in summer. Pick regularly as fruit ripens over several weeks; use immediately or store briefly in the fridge. The fruit is best eaten fresh or used in jams.
In the Kitchen
Harvest ripe white fruit when soft and easily detached, typically in summer. Pick regularly as fruit ripens over several weeks; use immediately or store briefly in the fridge. The fruit is best eaten fresh or used in jams.
Troubleshooting
Yellow leaves: often from overwatering or poor drainage; reduce water and improve soil. Brown leaf edges: caused by dry air or sun scorch; increase shade and humidity. Stunted growth: from cold or frost; protect with mulch or cover. Fruit not setting: lack of pollinators or birds; hand-pollinate or net. Leaf drop: from transplant shock; water well and shade.