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With a decent flowering period from late spring to midsummer, the vigorous Knotweed is an excellent choice for the damp garden. The bottlebrush-like, tiny mauve-pink flowers are packed tightly together on thin stems, above the dock-like foliage. The best planting position is at the edge of a pond or in a bog garden, where it quickly spreads forming impressive colonies up to 1m wide. 'Superba' is better than the species because it has larger flowers. It has been given the Award of Garden Merit (AGM) by the Royal Horticultural Society.
Plant type: Hardy perennial
Flower colour: Pink
Foliage colour: Mid-green
Feature: Flowers, Dramatic foliage
Sun exposure: Full sun, Partial shade
Soil: Well-drained/light, Clay/heavy, Acidic, Moist, Boggy
Skill level: Beginner
Time to divide plants: September to November
I use your tips and ideas for my garden. I moved to my new house 3 years ago but only just getting started here. I used all your help for my old house garden and after 13 years there my garden was a haven for insects, animals and me. Thank you.
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