Photo: Krzysztof Ziarnek, Kenraiz · CC BY-SA 4.0 · Wikimedia Commons
Bloom colours
violet, rose
What actually matters with this one
The Chelsea chop — halving it in late May — is what stops a two-metre plant collapsing across the path.
How to grow it
- Light
- full sun
- Water
- Even moisture
- Hardiness
- Zones 4-8
- Height
- 1.5 m
- Flowers
- September to October
- Difficulty
- easy
Plant it alongside
Relatives and plants that want the same conditions.
