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PERSICARIA alpina
Commonly known as Alpine knotweed
(syn. P. polymorpha) - tall growing with tall stems or plumes of creamy-white flowers
Further Reading....
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DeciduousLinear to narrowly lance-shaped leaves to 15cm (6in) long on stalks 1cm (½in) long
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WhiteCreamy white
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HeightTo 1.8m (6ft)
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SpreadTo 1.5m (5ft)
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Bulb/Corm or rhizomatous perennialErect, clump-forming rhizomatous perennial, many branched from the middle upwards. Produces spikes of cup- to funnel-shaped flowers to 15cm (6in) long
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HerbaceousEarly in the year, typically January till end of March, herbaceous plants might be supplied in 9cm pots to ensure timely despatch.
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Hardy - very cold winterHardy in all of UK and northern Europe. Plant can possibly withstand temperatures down to -20°C (-4°F)
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Full sun
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Partial shade
PERSICARIA alpina
- Details
- Description
- Mature Size
- Tips and Advice
- Goes Well With
- Planting Combinations
- Other Suggestions
- See Also...
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Additional FeaturesGood to knowAlso known as Polygonum alpinum acc. to RHS in the AtoZ (height and spread to 1m) and also Persicaria polymorpha by the RHS online (height and spread 2m x 1.5m)Pests & DiseasesNonePlace of originEurasiaResistant to honey fungusThese plants have little or few problems with honey fungus.
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HardinessFully hardy
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Seasonal InterestSummer
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Soil ConditionsTolerates allAny moist soil
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WildlifeRabbit 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
- Overpotting Problems - Video Tip ondemand_video
Persicaria - Growing Guide
to 1.8m (6ft)
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to 1.5m (5ft) |




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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