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    • Pond vases
    • Swim ponds
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  • Home
  • Inspiration
    • Classic ponds
    • Reflecting/Modern ponds
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    • Waterfalls and streams
    • Patio ponds
    • Pond vases
    • Swim ponds
  • Plants
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    • Pond plants zone 1
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Polygonum bistorta

Knotgras

Dense spikes of soft pink flowers are produced in mid summer and on into early autumn above semi-evergreen, deeply veined, mid-green leaves. This perennial forms clumps of attractive foliage and makes dense groundcover in both sun and semi shade. It should be planted in bold drifts where it adds interest in the border right through into the autumn. Like other Persicaria it does not like dry soil, so it grows best in a bog garden or beside a pond. As well as gardeners, bees and other insects love it too!

Mix this plant with:

Canna Wilma

Mazus reptans Blauw

Carex pendula

Acorus gramineus ‘Ogon’

Stachys palustris

Characteristics

  • 40 / 60 cm
  • V-VII
  • Pink
  • Waterside plants

Pond type

Natural ponds

Plant group

Zone 1

Legend

  • Height
  • Depth
  • Flower time
  • Color
  • Plant species

Mix this plant with:

Preslia cervina ‘Alba’

Sarracenia Farnhannii

Carex riparia

Juncus inflexus

Iris siberica

Acorus gramineus ‘Ogon’

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