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Burncoose Nurseries - part of the Caerhays Estate
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  • PERSICARIA
    © Burncoose Nurseries, all pictures for illustrative purposes only.
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    PERSICARIA   PERSICARIA   PERSICARIA   PERSICARIA   EUPHORBIA x pasteurii and PERSICARIA
© Burncoose Nurseries, all pictures for illustrative purposes only. Monarda ‘Prairie Night’, Eryngium ‘Picos Blue’, Argyranthemum ‘Chelsea Girl’, Blue Phlox and Persicaria
© Burncoose Nurseries, all pictures for illustrative purposes only.
    >

    PERSICARIA

    Commonly known as (Polygonum) - Knotweed

    Genus of about 150 annuals and perennials. They may be evergreen, semi-evergreen or deciduous and many spread by stolons leading to a spreading habit which can be invasive. This habit and their commonly used name knotweed can give cause for concern but used wisely they are worthy performers. They are found in a variety of habitats worldwide and most have long-lasting spikes of flowers followed by distinctive 3-angled or ovoid fruits.

    Full Plant Details - Sun/Soil & other attributes - Click to close
    • Good to know
      Poker type flowers. Some have attractive autumn colour. Some are invasive. Wildlife plant - insects.
    • Place of origin
      Various habitats around the world.
    • Resistant to honey fungus
      These plants have little or few problems with honey fungus.
    • Deciduous
    • Evergreen
    • Semi-evergreen
      Keeps some of its foliage all year, and will drop some leaves as well.
    • Ground cover
      These plants are typically low growing and spread quickly to inhibit weed growth on areas of bare soil
    • Herbaceous
      Early in the year, typically January till end of March, herbaceous plants might be supplied in 9cm pots to ensure timely despatch.
    View Planting Tips and Care Advice

    Varieties

    PERSICARIA affinis
    Deep pink
     
    1.5 to 2 Litre
    £12.50
    Available again from summer 2025
    Could be any time, June through to end August. This is not a guaranteed date but an estimate and subject to availability.
    Notify me when this plant is available to order
    PERSICARIA amplexicaulis 'Blackfield'
    Slender flowers in deep red-black. A smouldering beauty
     
    1.5 to 2 Litre
    £13.50
    Available again from summer 2025
    Could be any time, June through to end August. This is not a guaranteed date but an estimate and subject to availability.
    Notify me when this plant is available to order
    PERSICARIA bistorta 'Superba'
    Bistort
    Clear pink poker flowers
     
    1.5 to 2 Litre
    £12.50
    PERSICARIA vaccinifolia
    Tiny pink flowers, good ground cover, and excellent autumn colour
     
    1.5 to 2 Litre
    £12.50
    Available Early Spring 2026
    Spring according to the Met office is defined as March 1st - May 31st. Therefore early spring is early March to mid-April. This is not a guaranteed date but an estimate and subject to availability.
    Notify me when this plant is available to order

    Useful extras...

    Fertilisers & Feeds - Empathy
    Recommended by the RHS. Contains Rootgrow™ mycorrhizal fungi. Suitable for all trees and shrubs (except rhododendrons, azaleas, heathers, cranberries and blueberries)
    Small - 60g sachet
    £3.00
    Medium - 150gm sachet
    £6.00
    Large - 360gram sachet
    £12.00
    Unavailable
    Fertilisers & Feeds - Empathy
    All-purpose organic concentrated seaweed feed that is a ready to use, derived from sustainable harvested kelp, that can be used on all outdoor and indoor plants, except acid loving plants. Perfect used in conjunction with Rootgrow™.
    1 ltr
    £8.50
    Vermin & Pest Control
    This is a non-biological non-chemical plant insecticide and mildewcide. Works against the physical motion of the insect. Perfect for all plants and edible crops.
    500 ml
    £8.00
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