How to grow blue quandong
Overview
Blue quandong (Elaeocarpus angustifolius) is a large rainforest tree or shrub grown for its ornamental form and edible blue fruits. It thrives in warm, wet districts and needs space and shelter when young.
Soil Preparation
Blue quandong prefers rich, well-drained soil with a pH of 6.0–7.0. Amend with organic matter before planting. Ensure good drainage to prevent root rot.
Growing Guide
Plant blue quandong in full sun with steady moisture and well-drained soil. Space at least 3–5 m apart to allow for its eventual size. Protect young plants from strong winds and cold snaps; wait for warm weather before planting in cooler districts.
Sowing
Sow blue quandong seeds 1–2 cm deep in a seed-raising mix. Germination takes 4–8 weeks. Keep warm and moist; transplant when seedlings are 15–20 cm tall.
Care
Feed blue quandong with a balanced slow-release fertiliser in early spring and mid-summer. Prune lightly after harvest to shape and remove dead wood. Protect young plants from strong winds.
Companion Planting
Grow blue quandong with other rainforest species like Davidson's plum, finger lime, and macadamia. Avoid planting near shallow-rooted trees that may compete for moisture.
Common Pests & Risks
Birds and fruit-eating pests may target blue quandong. Use netting to protect ripening fruit. Monitor for scale insects and treat with horticultural oil if needed.
Harvesting
Harvest blue quandong fruits when they turn deep blue and soften slightly. Use regionally; ensure correct identification before eating. Fruits are best fresh or in preserves.
In the Kitchen
Blue quandong fruits are edible and can be eaten fresh or used in jams, sauces, and desserts. Store in a cool place; use within a few days of harvest.
Troubleshooting
Yellow leaves: overwatering or poor drainage; reduce watering. Brown leaf edges: wind or sun scorch; provide shelter. Stunted growth: insufficient warmth; move to a warmer spot. Fruit drop: inconsistent watering; maintain steady moisture.