Buddleja davidii Black Knight
Buddleja davidii Black Knight
Price comparison:
£15.00 – £24.60
From 3 UK retailers
Buddleja davidii Black Knight is a rewarding deciduous shrub for UK gardens, flowering from June to August. Growing to 3m or more, it thrives in full sun. Valued by gardeners for being the butterfly bush — essential for pollinators.
Sun
☀️ Full Sun
Water
💧💧 Moderate
Hardiness
🌡️ H6 (Hardy)
Size
📏 3.0m tall × 3.0m wide
Flowers
🌸 jun,jul,aug
Wildlife
🐝 The butterfly bush — essential for pollinators
Compare Prices
Prices from 3 retailers across 4 sizes
Prices shown are for different pot sizes — compare within size groups for accurate savings
Prices last checked: 29 Aug 2026
Prices exclude delivery. Check retailer for final price.
Retailers shown in order of price — lowest first within each size group.
| Roots Plants | £15.00Out of stock | 2L | View at Roots PlantsOpens product page · Affiliate info |
| Crocus £5.99 flat rate per order | £19.99Out of stock | 80-100cm | View at CrocusOpens product page · Affiliate info |
Crocus
£5.99 flat rate per order
Size: 80-100cm
| Paramount Plants Variable by postcode — calculated at checkout. Free to EN postcodes | £24.60Out of stock | bare root | View at Paramount PlantsOpens product page · Affiliate info |
Paramount Plants
Variable by postcode — calculated at checkout. Free to EN postcodes
Size: bare root
| Crocus £5.99 flat rate per order | £19.99Out of stock | Check retailer for size | View at CrocusOpens product page · Affiliate info |
Crocus
£5.99 flat rate per order
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: 29 Aug 2026
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Plant Information
About this plant
Buddleja davidii Black Knight is a rewarding deciduous shrub for UK gardens, flowering from June to August. Growing to 3m or more, it thrives in full sun. Valued by gardeners for being the butterfly bush — essential for pollinators.
Latin Name
Buddleja davidii Black Knight
Family
Hardiness Zone
H6
Care Level
moderate
Sun Exposure
full-sun
Water Needs
moderate
Flowering Season
jun,jul,aug
Mature Height
3.0m
Frequently Asked Questions
How much does Buddleja davidii Black Knight cost in the UK?
Buddleja davidii Black Knight prices in the UK range from £15.00 to £24.60 depending on pot size and retailer. The cheapest price is currently at Roots Plants at £15.00. Prices are checked nightly across 3 UK nurseries.
Where can I buy Buddleja davidii Black Knight online in the UK?
You can buy Buddleja davidii Black Knight from 3 UK nurseries including Roots Plants, Paramount Plants, Crocus. ComparePlants.uk compares prices across all of them so you can find the best deal.
What is the scientific name for Buddleja davidii Black Knight?
The scientific name for Buddleja davidii Black Knight is Buddleja davidii Black Knight.
Related reading
How to Support Wildlife in August
In August, supporting garden wildlife in the UK means providing nectar-rich flowers for pollinators, leaving seed heads for birds, and making your garden a welcome haven for hedgehogs and amphibians.
Read the guide →Best Plants for Pollinators in High Summer
High summer is a crucial time to keep your garden buzzing with bees and butterflies, and lavender, verbena, and echinacea are perfect for the job.
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