How to grow Hibiscus in Australia
Plant in full sun in fertile, well-drained soil with shelter from strong wind. Water regularly to keep the soil moist, as flowering suffers when plants dry out, and feed through the growing season for a steady show of blooms.
At a glance
- Difficulty: Beginner
- Sun: Full sun
- Water: 6 litres a week, watered every 3 days
- Spacing: 150 cm
- Time to harvest: 120 days
- Time to germinate: 14 days
- Soil pH: 6 to 7
- Frost tolerance: Frost tender
When to sow by region
| Region | When to sow | Regional note |
|---|---|---|
| South East Queensland | September to November | |
| Northern Rivers NSW | September to November | |
| Sydney & Coastal NSW | October to December | Sow rosella or plant hibiscus Oct to Dec. Rosella needs a long hot season, so start it early in the warmest spot; frost tender. |
| Melbourne & Victoria | November and December | Rosella as annual in warm spots only. Very narrow window. Nov to Dec sow. |
| Adelaide & SA | October and November | Plant Oct to Nov after frost in a warm sheltered spot. Water well through summer; cover young plants on frosty nights. |
| Perth & WA | September to November | |
| Tasmania | Not suited | Unsuitable. Rosella needs a long hot season. Not viable in Tasmania. |
| Canberra & ACT | Not suited | Rosella not viable in Canberra. Frost kills. |
| North Queensland | September to February | Rosella thrives. Year-round warmth ideal. |
| Darwin & Top End | All year | Year-round in Darwin. Rosella grows vigorously. |
Varieties
- Rosella (Hibiscus sabdariffa)
- Native Rosella
Companion planting
Good companions
- Tropical plants
Harvest and storage
Harvest tip
Pick the calyces around the flower base when plump and crisp, soon after the petals drop. Snap or cut them off, and plants keep producing as more flowers fade.
Storage
Dry calyces and store in a sealed jar for 12+ months. Fresh fridge 1 week.