Plants by mail order since 1984, over 4100 plants online today!
6th January 2021. In line with the current government lockdown rules, Burncoose Nurseries is closed to visitors. However at present we are able to offer click and collect to local customers. This will be weekdays only, not weekends.
Mail order is continuing as normal. However please allow extra time for the couriers to deliver, once despatched from us. Sorry to say that some depots are experiencing high volumes of traffic, also staff shortages.
PERSICARIA amplexicaulis 'Blackfield'
Commonly known as Knotweed, Polygonum
Slender flowers in deep red-black. A smouldering beauty
Further Reading....
- Details
- Description
- Mature Size
- Tips and Advice
- Goes Well With
- Planting Combinations
- Other Suggestions
- See Also...
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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.
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Red - deep red black
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Height - to 1.2m (4ft)
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Spread - to 1.2m (4ft)
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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
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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)
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Full sun
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Partial shade
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Additional Features - Pests & Diseases - - none
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Place of origin - garden origin
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Resistant to honey fungus - These plants have little or few problems with honey fungus.
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Flower Shape - Bell/Lantern - - narrowly bell-shaped 5mm (¼in) long
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Spikes - long-stalked narrow spikes to 10cm (4in) long
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Hardiness - Fully hardy -
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Seasonal Interest - Summer -
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Soil Conditions - Tolerates all - - any moist soil.
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Wildlife - Bee friendly -
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Rabbit Resistant
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Herbaceous Plants - Video Collection
- Dividing Herbaceous Perennials - Video Tip ondemand_video
- Spring Planting Osteospermums - Video Tip ondemand_video
- Dividing Summer Perennials - Video Tip ondemand_video
- Dividing summer flowering Hemerocallis - Video Tip ondemand_video
- Summer propagation - Video Tip ondemand_video
- Self-seeding aquilegia - Video Tip ondemand_video
- Supporting Plants - Video Tip ondemand_video
- Dead heading meconopsis - Video Tip ondemand_video
- Dead heading Delphiniums - Video Tip ondemand_video
- Feeding herbaceous peonies - Video Tip ondemand_video
to 1.2m (4ft)
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to 1.2m (4ft) |







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HEMEROCALLIS
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MONARDA 'Prairie Night'
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PERSICARIA
(Polygonum) - Knotweed

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STACHYS lanata 'Silver Carpet'
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Useful extras...

Harrod Horticulture Plant Supports - Plant & Border Supports
Curved border restraints
The border restraints are made from sturdy, solid 6mm galvanised steel wire and powder coated dark olive green, available in a variety of sizes providing strong plant support to stop plants falling across lawns and paths
4 options from £14.50

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