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
    1.2m (4ft)
  • Spread
    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'

 

 

  • 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
  • Garden Location/Conditions
    Border
    Suitable for a mixed or herbaceous border
  • 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
1.2m (4ft)
 Herbaceous - guide for size not form Watering Can
  1.2m (4ft)
  

Useful extras...

Fertilisers & Feeds - Empathy
Afterplant - Grow Your Own
AFTER PLANT GROW YOUR OWN seaweed is ready to use liquid concentrate that was specially formulated be used on all edible plants.
Only £8.00

Vermin & Pest Control
Slug Pellets
Slug killer blue mini pellets are easy to use and give effective control of slugs and snails. Ideal in garden, conservatory or greenhouse.
Only £6.50

Fertilisers & Feeds - Empathy
Wildflower Mini Meadow
Creates a mini-meadow for attracting bees, butterflies and bugs to your garden. 200g sachet which will cover 3 square metres. Contains Rootgrow™ mycorrhizal fungi.
2 options from £7.00

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)
3 options from £3.00

Fertilisers & Feeds - Empathy
Afterplant - Tomatoes
AFTER PLANT TOMATO FEED Liquid Concentrate with Bio stimulant is a high potash liquid concentrate containing seaweed extract, plant derived amino acids and other nutrients specifically formulated to benefit tomatoes and greenhouse plants.
Only £8.00

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

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