How to grow tamarind
Overview
Tamarind (Tamarindus indica) is a long-lived tropical tree grown for its edible, tangy pods. It requires full sun, warm frost-free conditions, and deep soil to establish a strong root system before fruiting.
Varieties
- Sweet Tamarind — A sweeter, less acidic variety popular in northern NSW and QLD for fresh eating.
- Makham — A Thai cultivar with large pods and high pulp yield, suited to tropical gardens.
Soil Preparation
Tamarind prefers deep, well-drained loam or sandy loam with pH 6.0–7.5. Improve heavy clay with gypsum and compost; avoid waterlogged sites. Add lime if pH is below 5.5.
Growing Guide
Plant tamarind in a deep, well-drained loam or sandy soil in full sun. Space trees at least 8–10 m apart to allow for their large canopy. Soak seeds for 24 hours before sowing 2 cm deep in seed trays; transplant when 30 cm tall. Water deeply but infrequently once established, and avoid overwatering which can cause root rot. Young trees need staking and protection from wind until the trunk thickens.
Sowing
Sow tamarind seeds 2 cm deep in seed trays or direct in pots; germination takes 10–14 days at 25–30°C. Soak seeds overnight to improve germination. Transplant seedlings when 30 cm tall to avoid root disturbance.
Care
Feed tamarind with a balanced slow-release fertiliser (10-10-10) in early spring and again in late summer. Prune lightly after harvest to remove dead wood and shape the canopy; avoid heavy pruning as it reduces fruiting. Mulch with organic matter to retain moisture in dry periods.
Companion Planting
Underplant with sweet potato, comfrey, or pigeon pea to build soil and provide shade. Avoid planting near shallow-rooted vegetables that compete for water, or under heavy-fruiting trees like mango that may crowd the canopy.
Common Pests & Risks
Scale insects and mealybugs can be controlled with horticultural oil or neem spray. Borers may attack stressed trees; keep the trunk clean and avoid mechanical damage. Monitor for fruit fly in subtropical zones and use netting if needed.
Harvesting
Harvest tamarind pods when they turn brown and the shell cracks easily, usually 8–9 months after flowering. Pick by hand or shake branches over a tarp; store pods in a cool dry place for up to 6 months.
In the Kitchen
Use tamarind pulp in chutneys, curries, and drinks; soak pods in warm water and squeeze to extract juice. Store dried pulp in an airtight container for up to a year. Freeze fresh pods for later use.
Troubleshooting
Yellow leaves: overwatering or poor drainage—reduce water and improve soil. Brown leaf edges: salt buildup or dry air—flush soil and increase humidity. Slow growth: lack of heat or root competition—ensure full sun and mulch. Pod drop: inconsistent watering during pod set—maintain even moisture. No fruit: tree too young or cold damage—wait 5–7 years for maturity.