- Perennials
- Flower colour : Purple
- Sowing month outside : May
- Plant Seasons : Perennials
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Soil type
Special conditions
Ready made borders
Planting combinations
Flowering month
Evergreen / deciduous
Fragrance
Attractive to wildlife
Quick growing
Eventual size
RHS Autumn catalogue 2021
Hardy
Leaf colour
Ground cover
Position
Soil moisture
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