PERSICARIA amplexicaulis 'Blackfield'

Commonly known as Knotweed, Polygonum

Slender flowers in deep red-black. A smouldering beauty
Further Reading....
  • Semi-evergreen
    Keeps some of its foliage all year, and will drop some leaves as well.
    Ovate, lance-shaped, pointed, mid-green leaves to 25cm (10in) long, slightly puckered.
  • Red
    Deep red black
  • Height
    To 1.2m (4ft)
  • Spread
    To 1.2m (4ft)
  • Herbaceous
    Early in the year, typically January till end of March, herbaceous plants might be supplied in 9cm pots to ensure timely despatch.
    Robust, clump-forming perennial
  • Hardy - cold winter
    Hardy in most places throughout the UK even in severe winters. May not withstand open/exposed sites or central/northern locations. Plant can withstand temperatures down to -15°C (5°F)
  • Full sun
  • Partial shade

PERSICARIA amplexicaulis 'Blackfield'

 
Available Early Spring 2023 - 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.
individually £13.50 each , 3+ £11.00 each 
Delivery Information Available Early Spring 2023
plant size comparison icon 1.5 to 2 Litre
Click to see photo

 

  • Additional Features
    Pests & Diseases
    None
    Place of origin
    Garden origin
    Resistant to honey fungus
    These plants have little or few problems with honey fungus.
  • Flower Shape
    Bell/Lantern
    Narrowly bell-shaped 5mm (¼in) long
    Spikes
    Long-stalked narrow spikes to 10cm (4in) long
  • Hardiness
    Fully hardy
  • Seasonal Interest
    Summer
  • Soil Conditions
    Tolerates all
    Any moist soil.
  • Wildlife
    Bee friendly
    Rabbit Resistant
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Herbaceous Plants - Video Collection
Persicaria - Growing Guide
to 1.2m (4ft)
 Herbaceous - guide for size not form Watering Can
  to 1.2m (4ft)
  

Useful extras...

Fertilisers & Feeds - Vitax
Q4 Pelleted Fertiliser
A useful fertiliser suitable for use on a wide variety of plants. Q4 provides all the nutrients and trace elements essential for vigorous growth, abundant flowering and ripening of fruit.
3 options from £6.00

Fertilisers & Feeds - Empathy
Rootgrow mycorrhizal fungi
Recommended by the RHS. Contains Rootgrow™ mycorrhizal fungi. Suitable for all trees and shrubs (except rhododendrons, azaleas, heathers, cranberries and blueberries)
2 options from £6.00

Fertilisers & Feeds - Empathy
All-purpose Seaweed Stimulant
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™.
Only £7.50

Share this page

Twitter Facebook Digg
Visit the Caerhays Castle website
Order the 2022 Burncoose Catalogue
Payment methods accepted
watch us on you tube
Visit Burncoose House - Holiday Accommodation
Burncoose Nurseries: Gwennap, Redruth, Cornwall TR16 6BJ
Telephone: +44 (0) 1209 860316 Email: info@burncoose.co.uk
© Burncoose Nurseries 1997 - 2022      Website by Forgecom
All plant pictures are copyright © Burncoose Nurseries unless otherwise stated.
No rights are given to download any of our pictures and use them (for personal or professional use) without our consent.