Illustration. See the retailer's page for photos of the actual plant.
Knotweed Superba
Persicaria affinis 'Superba'
Price comparison:
£7.10
From 2 UK retailers
Knotweed Superba is a ground cover plant that thrives in partial shade and moist soil. Growing to about 1.2m, it flowers from July to October. A reliable choice for pollinator-friendly gardens.
Sun
⛅ Partial Shade
Water
💧💧💧 High (Moist)
Hardiness
🌡️ H7 (Fully Hardy)
Size
📏 1.2m tall × 90cm wide
Flowers
🌸 jul,aug,sep,oct
Wildlife
🐝 Pollinator-friendly
Compare Prices
Prices from 2 retailers
Prices last checked: 21 Oct 2026
Prices exclude delivery. Check retailer for final price.
Retailers shown in order of price — lowest first within each pot size. Packs are compared only with packs of the same size. Listings without a stated pot size are not ranked.
| Claire Austin Hardy Plants £5.50 standard delivery | £7.10Checked 21 Oct | 9cm | View at Claire Austin Hardy PlantsOpens product page · Affiliate info |
Claire Austin Hardy Plants
£5.50 standard delivery
Size: 9cm
| Hayloft £6.95 flat rate. Free over £75 | £16.00Check availability at retailerChecked 27 Oct | Check retailer for size | View at HayloftOpens product page · Affiliate info |
Hayloft
£6.95 flat rate. Free over £75
Size: Check retailer for size
Prices shown exclude delivery. Delivery charges vary by retailer — see individual listings for details.
Prices may vary. Click through to the retailer for current pricing.
Prices last checked: 21 Oct 2026
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Plant Information
About this plant
Knotweed Superba is a ground cover plant that thrives in partial shade and moist soil. Growing to about 1.2m, it flowers from July to October. A reliable choice for pollinator-friendly gardens.
Latin Name
Persicaria affinis 'Superba'
Family
Hardiness Zone
H7
Care Level
moderate
Sun Exposure
partial-shade
Water Needs
high
Flowering Season
jul,aug,sep,oct
Mature Height
1.2m
Frequently Asked Questions
How much does Knotweed Superba cost in the UK?
Knotweed Superba prices in the UK range from £7.10 to £7.10 depending on pot size and retailer. The lowest price we track is £7.10 for a 9cm pot at Claire Austin Hardy Plants. Prices are checked nightly across 2 UK nurseries.
Where can I buy Knotweed Superba online in the UK?
You can buy Knotweed Superba from 2 UK nurseries including Claire Austin Hardy Plants, Hayloft. ComparePlants.uk compares prices across all of them so you can find the best deal.
What is the scientific name for Knotweed Superba?
The scientific name for Knotweed Superba is Persicaria affinis 'Superba'.
Related reading
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Read the guide →How to Support Wildlife in September
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