Swan River daisy Brachyscome iberidifolia
Swan River daisy (Brachyscome iberidifolia) is an annual flowering plant in the Asteraceae family, native to Australia (southern and eastern states). It grows 20–45 cm (8–18 in) tall and 25–40 cm (10–16 in) wide, wants full sun and moderate water, and is hardy to about -2 °C (28 °F). Space plants about 25 cm (10 in) apart.
Plan Swan River daisy in your garden →
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Swan River daisy at a glance
| Type | Annual flowering plant |
|---|---|
| Family | Asteraceae |
| Mature height | 20–45 cm (8–18 in) |
| Mature spread | 25–40 cm (10–16 in) |
| Spacing | 25 cm (10 in) centre to centre |
| Sun | Full sun, at least 6 h of direct sun a day |
| Water | Moderate; drought tolerance moderate, waterlogging tolerance none |
| Soil pH | 6–7.5 |
| Cold hardiness | About -2 °C (28 °F) once established (roughly USDA zone 9) |
| Heat stress | Likely above about 32 °C (90 °F) |
| Flowering | about 9–13 weeks after planting, for 9–17 weeks |
| Days to maturity | About 90 days from planting |
| Wind tolerance | Low |
| Pollinator value | High |
| Edible | Not grown as food |
| Native to | Australia (southern and eastern states) |
| Common in gardens of | 🇦🇺 Australia |
Is Swan River daisy toxic?
- People: not well documented
- Cats: not well documented
- Dogs: not well documented
No toxicity data found in ASPCA or standard poison references; daisy-family plants can irritate sensitive skin.
If a child or pet may have eaten part of a plant, call a poison centre or vet straight away.
Companion planting: what to grow with Swan River daisy
No well-documented helpful pairing. Group it with plants that like full sun and moderate water.
Questions about Swan River daisy
- How far apart should I plant Swan River daisy?
- About 25 cm (10 in) apart, centre to centre. A mature plant spreads 25–40 cm (10–16 in).
- Does Swan River daisy need full sun?
- Full sun: at least 6 hours of direct sun a day.
- How much water does Swan River daisy need?
- Moderate water. Drought tolerance is moderate and waterlogging tolerance none.
- How cold-hardy is Swan River daisy?
- It tolerates about -2 °C (28 °F) once established, roughly USDA zone 9. As an annual it is usually planted out after the last frost.
- When does Swan River daisy flower?
- About 9–13 weeks after planting, for 9–17 weeks.
- Is Swan River daisy poisonous to cats and dogs?
- For cats it is not well documented; for dogs not well documented; for people not well documented. No toxicity data found in ASPCA or standard poison references; daisy-family plants can irritate sensitive skin.
- What grows well with Swan River daisy?
- There is no well-documented companion pairing for Swan River daisy. Group it with plants that like the same sun (full sun) and water (moderate).
Sources and evidence
Evidence grade C (C: plausible, mixed evidence).
- RHS Plant Finder, Royal Horticultural Society
- Australian native plant profiles, Australian National Botanic Gardens / Australian Plants Society
Notes and assumptions
- Typical garden-form values; cultivars and local conditions differ.
- Annual in the wild and in gardens; often replaced by short-lived hybrids sold as Brachyscome multifida.
Reference values for planning, not horticultural, veterinary or medical advice. Varieties, soils and local climates differ: check with a local nursery or extension service.
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