Tall South American annual with rounded heads of white, pink, or magenta flowers with long protruding stamens that give the spidery appearance and the common name. Continuous flowering from mid-summer to first frost.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 2–11 | −45.6 °C to 10 °C | Zones where it can be grown as an annual — not a frost-tolerance rating |
| RHS hardiness rating | H2 | 1 °C to 5 °C | Plant needs at least this level of cold tolerance |
| Canadian plant hardiness zone | Zone 2–9 | −40 °C and warmer | Zones where it can be grown as an annual — not a frost-tolerance rating |
| Australian (ANBG) zone | Zone 1–7 | −15 °C and warmer | Zones where it can be grown as an annual — not a frost-tolerance rating |
As a tender annual, Spider flower doesn't overwinter — the zone range shows where the growing season supports it. See the RHS rating for its actual cold tolerance.
Growing notes
- Plant in sunny mid-border positions — vertical accent at 1–1.5 m tall, continuous flowering until first frost
- Outstanding nectar source for hummingbirds, hawk-moths, and bumblebees, especially in the evening when the flowers are most fragrant
- Self-seeds where the climate suits, perpetuating itself once established
- Stems and seed pods carry small thorns — handle with gloves
Categories
Related plants
Cross-check Spider flower against your zones