How to grow native tamarind
Overview
Native tamarind (Diploglottis australis) is a rainforest shrub or small tree from eastern Australia, grown for its edible orange fruit and attractive foliage. It thrives in warm, moist conditions with some shade from harsh sun.
Soil Preparation
Prefers slightly acidic to neutral pH (5.5–7.0) in deep, fertile loam. Add compost and aged manure before planting. Ensure good drainage; avoid heavy clay or waterlogged sites.
Growing Guide
Plant native tamarind in a sheltered spot with dappled shade or morning sun and afternoon protection. Space 3–4 m apart in rich, well-drained soil. Dig a hole twice the root ball, backfill with compost and native soil, and water deeply. Stake young plants in windy areas. Mulch heavily with organic matter to keep roots cool and moist.
Sowing
Sow fresh seed in spring or summer in seed-raising mix, 1 cm deep. Germination takes 3–6 weeks. Keep seedlings moist and shaded. Direct sow is not recommended; transplant when 20–30 cm tall.
Care
Feed with a balanced organic fertiliser in early spring and again in early autumn. Prune lightly after harvest to shape and remove dead wood. Mulch well to retain moisture and suppress weeds.
Companion Planting
Grow with other rainforest species like Davidson's plum, finger lime, and lemon myrtle for a diverse edible garden. Avoid planting near eucalypts or grevilleas, which may compete for nutrients and moisture.
Common Pests & Risks
Fruit fly can be a problem in warmer areas; use eco-friendly traps or netting. Birds may take ripe fruit—cover with bird netting. Scale insects occasionally appear on stems; treat with horticultural oil.
Harvesting
Harvest fruit when it turns bright orange and softens slightly, usually from late summer to autumn. Pick by hand or shake branches over a tarp; fruit does not store long and is best used fresh or frozen.
In the Kitchen
The tart orange flesh is used in sauces, chutneys, and desserts. Store fresh fruit in the fridge for up to a week, or freeze pulp for later use. Avoid eating the seed—it is not edible.
Troubleshooting
Yellow leaves: often from waterlogging or poor drainage—improve soil and reduce watering. Brown leaf edges: caused by dry air or insufficient humidity—increase misting or mulch. Stunted growth: check for root competition from nearby trees—clear a 1 m radius. Fruit drop: may be from inconsistent watering—keep soil evenly moist. Leaf spots: fungal in humid weather—improve air circulation and remove affected leaves.