How to grow bush tomato
Overview
Bush tomato (Solanum centrale) is a small shrub native to Australia's arid interior, grown for its raisin-like fruits that are used in bushfood cuisine. It is a drought-hardy plant that thrives in hot, dry conditions but is sensitive to frost and requires well-drained soil.
Soil Preparation
Bush tomato prefers slightly alkaline to neutral soil (pH 6.5-7.5) that is sandy or gravelly and very well-drained. Improve heavy clay with coarse sand or decomposed granite. Avoid rich, loamy soil—it can cause lush growth and poor fruiting.
Growing Guide
Sow seeds 5mm deep in seed-raising mix, keeping warm at 25-30°C; germination takes 14-28 days. Transplant seedlings 50cm apart into full sun with free-draining soil. Do not overwater—let the soil dry between drinks. In cooler zones, grow in a warm, sheltered spot or against a north-facing wall. Mulch with gravel or coarse sand to prevent root rot.
Sowing
Sow seeds 5mm deep in seed-raising mix, keeping warm at 25-30°C; germination takes 14-28 days. Direct sow in warm soil after frost risk passes, or start in pots for cooler zones. Space plants 50cm apart.
Care
Feed with a low-nitrogen native fertiliser in early spring and again after harvest. Prune lightly after fruiting to maintain shape and airflow. Mulch with gravel or coarse sand to mimic arid conditions and prevent root rot.
Companion Planting
Plant with other arid-zone natives like desert raisin (Solanum ellipticum) or saltbush (Atriplex). Avoid planting near tomatoes or potatoes to reduce risk of sharing solanaceous pests and diseases.
Common Pests & Risks
Watch for spider mites in dry spells and fruit fly in warmer regions. Control spider mites with a strong water spray; manage fruit fly with exclusion bags or early harvest. Aphids may appear on new growth—use neem oil.
Harvesting
Harvest fruits when they turn from green to yellow-orange and begin to shrivel on the plant. Pick individually or shake onto a tarp. Dry in a warm, airy place for a few days before storing. Do not eat unripe fruit—it is toxic.
In the Kitchen
Use dried bush tomatoes as a tangy, raisin-like addition to stews, breads, and chutneys. They can be rehydrated or ground into a spice. Store in an airtight jar in a cool, dark place for up to a year.
Troubleshooting
Yellow leaves: overwatering or poor drainage—reduce water and check soil. Stunted growth: cold soil or frost—wait for warmth or protect with cloche. No fruit: too much nitrogen or shade—switch to native fertiliser and move to full sun. Leaf curl: spider mites—spray with water or neem oil. Fruit drop: heat stress or inconsistent water—maintain even moisture during fruiting.