Spreading perennial pond-margin plant with masses of small sky-blue flowers with yellow eyes in early summer. A reliable native for any wildlife pond.
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 1–5 | −15 °C to 10 °C | Plant tolerates down to this zone |
Growing notes
- Forage plant for bees and hoverflies
- Sky-blue flowers in early summer at the waterside are a classic seasonal marker
- Provides cover for emerging amphibians and damselflies at the pond margin
- Gentle, well-behaved spreader — easy to manage at the edge of a small pond
Categories
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