How to grow sandpaper fig
Overview
Sandpaper fig (Ficus coronata) is a versatile Australian native shrub valued for its edible fruit and ornamental foliage. It thrives in warm, humid conditions and requires protection from frost. Growers should provide consistent moisture and partial shade for best results.
Soil Preparation
Sandpaper fig grows best in slightly acidic to neutral soil (pH 5.5–7.0). Improve heavy clay with gypsum and organic matter to ensure drainage. Avoid waterlogged sites as the roots are susceptible to rot.
Growing Guide
Plant sandpaper fig in a position with morning sun and afternoon shade, or filtered light all day. It prefers well-drained, loamy soil enriched with organic matter. Space plants 3–4 metres apart to allow for their spreading habit. Water deeply and regularly during the first year to establish a strong root system. Mulch heavily to retain soil moisture and suppress competition.
Sowing
Seeds can be sown in spring in seed-raising mix, covered lightly. Germination takes 2–4 weeks at 20–25°C. Seedlings can be transplanted when 10–15 cm tall. However, cuttings from semi-hard wood are a more reliable method.
Care
Feed with a balanced native fertiliser in early spring and again in late summer. Prune lightly after fruiting to maintain shape and encourage new growth. Renew mulch annually to keep roots cool and moist.
Companion Planting
Good companions include other native edible shrubs like lilly pilly and finger lime, as well as understorey plants such as native ginger and ferns. Avoid planting near invasive vines or plants that require dry conditions, as sandpaper fig needs consistent moisture.
Common Pests & Risks
Common pests include scale insects and fruit fly. Scale can be controlled with horticultural oil in cooler months. Bird and possum damage to fruit is common; netting may be required. Ensure good air circulation to reduce fungal issues.
Harvesting
Harvest figs when they become soft and dark purple, typically in late summer to autumn. Pick gently as the fruit bruises easily. Figs ripen over several weeks, so check regularly for ready fruit.
In the Kitchen
The ripe figs have a sweet, mild flavour and can be eaten fresh or used in jams and desserts. They do not store well, so use immediately or preserve. The fruit is seedy but tasty.
Troubleshooting
Yellow leaves: often caused by overwatering or poor drainage; improve soil aeration and reduce watering. Leaf drop: may indicate cold stress or sudden temperature change; protect from frost. Poor fruiting: lack of sun or insufficient pollination; ensure adequate sunlight and consider hand pollination if needed. Scale on stems: treat with neem oil or horticultural oil in early morning. Fruit spotting: possible fungal infection; improve air circulation and avoid overhead watering.