North American native daisy with rich golden-yellow petals around a dark chocolate central cone. Peak bloom from midsummer well into autumn.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 3–9 | −40 °C to −1.1 °C | Zones where it can be grown as an annual — not a frost-tolerance rating |
| RHS hardiness rating | H7 | down to −20 °C | Plant needs at least this level of cold tolerance |
| Canadian plant hardiness zone | Zone 3–8 | −34 °C to −1 °C | Zones where it can be grown as an annual — not a frost-tolerance rating |
| Australian (ANBG) zone | Zone 2–6 | −10 °C to 15 °C | Zones where it can be grown as an annual — not a frost-tolerance rating |
As a tender annual, Black-eyed Susan doesn't overwinter — the zone range shows where the growing season supports it. See the RHS rating for its actual cold tolerance.
Growing notes
- Peak flowering July–September — runs straight through high summer from the solstice towards the equinox
- Behaves as a short-lived perennial or biennial — self-seeds reliably to perpetuate itself
- Drought tolerant once established — excellent prairie and meadow plant
- Cultivars include ‘Goldsturm’ (often listed under R. fulgida) for a more reliably perennial form
Categories
Related plants
Cross-check Black-eyed Susan against your zones