European native perennial with neat clumps of dark green leaves and upright spikes of small blue, pink, or white flowers in early summer. Reliable bee plant for the front of the sunny border.
Hardiness ratings
| System | Rating | Temperature range | How to read it |
|---|---|---|---|
| USDA hardiness zone | Zone 3–8 | −40 °C to −6.7 °C | Plant tolerates down to this zone |
| 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 | Plant tolerates down to this zone |
| Australian (ANBG) zone | Zone 2–5 | −10 °C to 10 °C | Plant tolerates down to this zone |
Growing notes
- Plant in the front of sunny mixed borders — compact mound with vertical flower spikes provides reliable summer structure
- Excellent bee forage — visited continuously throughout the long flowering period
- Cut back after first flush for a strong second flowering
- Drought tolerant once established
Categories
Related plants
Cross-check Spike speedwell against your zones