Japanese Raisin Tree

A deciduous tree native to East Asia, valued for its sweet-tasting fruit stalks that resemble raisins when dried.

1. Choosing the Right Location

• Sunlight: Prefers full sun to partial shade. In warmer regions of New Zealand, some afternoon shade helps protect the tree from excessive heat.
• Soil: Thrives in fertile, well-drained soil, such as loamy or sandy types, with a slightly acidic to neutral pH (6.0–7.5).
• Spacing: Allow 4–5 metres between trees for optimal growth and airflow.

2. Planting Time

• Best Time to Plant: Early spring (September–November) or autumn (March–May), when the soil is warm and workable.

3. Preparing the Planting Site

• Soil Preparation: Enrich the soil with compost or well-rotted sheep manure for improved fertility and drainage.
• Digging the Hole: Create a hole twice as wide and slightly deeper than the root ball (about 50cm wide and deep).
• Watering Hole: Water deeply after planting to help settle the soil.

4. Planting the Japanese Raisin Tree

• Plant Placement: Position the root collar level with the ground. Spread the roots naturally within the hole before backfilling.
• Support: Stake young trees to protect them from strong winds common in parts of New Zealand, such as Wellington or coastal areas.

5. Watering and Fertilising

• Watering: Water regularly during the first year, especially during dry spells, to establish deep roots. Once mature, the tree tolerates dry periods well.
• Fertilising: Feed annually in early spring with a balanced fertiliser (NPK 10-10-10) to support healthy growth and fruit development.

6. Mulching and Maintenance

• Mulching: Spread a 5–10cm layer of organic mulch, such as bark or pea straw, around the base to retain moisture and suppress weeds. Keep mulch away from the trunk to prevent rot.
• Pruning: Light pruning in winter removes dead or damaged branches and encourages strong growth.

7. Pest and Disease Control

• Pests: Generally resilient, but check for aphids or caterpillars. Use neem oil or soapy water as a natural solution.
• Diseases: Avoid waterlogged soils to prevent root rot, especially in high rainfall areas like the West Coast.

8. Winter Care

• Hardiness: Handles light frost well, but young trees benefit from a protective layer of mulch in colder areas such as the South Island.
• Dormancy: Reduce watering in winter as growth slows.

9. Common Uses

• Ornamental shade tree – Ideal for backyards and parks.
• Edible fruit stalks – Sweet stalks can be eaten fresh or dried as a snack.
• Bee-friendly – Its flowers attract bees, aiding pollination.

10. Tips for Success

• Choose a sheltered spot if planting in windy regions.
• Avoid heavy clay soils to minimise drainage issues.
• Monitor young trees for pests to ensure strong early growth.