Knotweed Superba
Persicaria affinis 'Superba'
Price comparison:
£5.00 – £12.99
From 3 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 3 retailers across 3 sizes
Prices shown are for different pot sizes — compare within size groups for accurate savings
Prices last checked: 8 May 2026
Prices exclude delivery. Check retailer for final price.
Retailers shown in order of price — lowest first within each size group.
| Claire Austin Hardy Plants £5.50 standard delivery | £5.00 | 9cm | View at Claire Austin Hardy PlantsOpens product page · Affiliate info |
Claire Austin Hardy Plants
£5.50 standard delivery
Size: 9cm
| Thompson & Morgan £6.99 for plants, £2.99 seeds only. Free over £60 | £12.99 | bare root | View at Thompson & MorganOpens product page · Affiliate info |
Thompson & Morgan
£6.99 for plants, £2.99 seeds only. Free over £60
Size: bare root
| Devon Pond Plants | £11.90 | Check retailer for size | View at Devon Pond PlantsOpens product page · Affiliate info |
Devon Pond Plants
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: 8 May 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 £5.00 to £12.99 depending on pot size and retailer. The cheapest price is currently at Claire Austin Hardy Plants at £5.00. Prices are checked nightly across 3 UK nurseries.
Where can I buy Knotweed Superba online in the UK?
You can buy Knotweed Superba from 3 UK nurseries including Claire Austin Hardy Plants, Devon Pond Plants, Thompson & Morgan. 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'.
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