How to grow tomatillo
Overview
Tomatillo (Physalis philadelphica) is a warm-season vegetable grown for its small green fruit encased in a papery husk, used in salsa verde and sauces. It requires at least two plants for cross-pollination and is a vigorous, productive addition to summer gardens.
Varieties
- Gigante — Produces large fruits, reliable in Australian summer conditions.
- Purple — Mild flavour with a purplish tinge, popular among home gardeners.
- Toma Verde — Standard green variety widely available in nurseries across Australia and New Zealand.
Soil Preparation
Plant in well-drained sandy loam with pH 6.0–7.0. Incorporate generous compost before planting to boost organic matter. Avoid heavy clay or waterlogged sites.
Growing Guide
Sow seeds 5 mm deep after the last frost, spacing plants 60–90 cm apart in full sun with consistent moisture. Provide stakes or cages as plants can reach 1.2 m tall. Pinch out early flowers to encourage stronger growth and avoid planting until soil is consistently above 15°C. Mulch to keep fruit clean and retain soil moisture.
Sowing
Sow seeds 5 mm deep, 2–3 per cell, thinning to one after germination at 20–25°C (7–14 days). Direct sow after frost or start indoors 6–8 weeks before transplanting. Space 60–90 cm apart in rows 1 m apart.
Care
Feed monthly with a balanced vegetable fertiliser or compost tea. Prune lower branches to improve airflow and reduce disease. Mulch to conserve moisture and keep fruit off the ground; remove any yellowing leaves promptly.
Companion Planting
Plant with basil, marigold, coriander, and borage to attract pollinators and repel pests. Avoid planting near fennel or potatoes, as they may compete or share diseases.
Common Pests & Risks
Aphids, flea beetles, and fruit fly are common. Use insecticidal soap for aphids, diatomaceous earth for beetles, and netting or bait for fruit fly. Remove affected fruit promptly.
Harvesting
Harvest when the husk splits and turns yellow to brown, usually 70–90 days after transplant. Fruits should be firm and fully fill the husk; regular picking encourages continued production.
In the Kitchen
Use fresh in salsas or cooked for sauces and fermentation. Remove the papery husk and wash the sticky residue before use. Store in the fridge for up to three weeks.
Troubleshooting
Yellow leaves: often overwatering or nutrient deficiency—improve drainage and apply balanced fertiliser. Blossom drop: lack of pollinators or heat stress—plant flowers nearby and provide shade if extreme. Small fruits: insufficient pollination—ensure at least two plants nearby. Fruit splits: irregular watering—maintain consistent moisture. No fruit set: indicates lack of a second plant for cross-pollination.