Delphinium Black Knight
Delphinium 'Black Knight'
Price comparison:
£4.74 – £23.40
From 7 UK retailers
Delphinium Black Knight is a garden perennial that thrives in full sun. Growing to about 1.5m, it flowers from June and July. A reliable choice for pollinator-friendly gardens.
Sun
☀️ Full Sun
Water
💧💧 Moderate
Hardiness
🌡️ H7 (Fully Hardy)
Size
📏 1.5m tall × 60cm wide
Flowers
🌸 jun,jul
Wildlife
🐝 Pollinator-friendly
Compare Prices
Prices from 7 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.
| Gardeners Dream | £9.99 | 9cm | View at Gardeners DreamOpens product page · Affiliate info |
| Farmer Gracy Flat rate per order. Free over £50. Ships from Netherlands | £4.74 | bare root | View at Farmer GracyOpens product page · Affiliate info |
| Suttons £6.99 for plants, £2.99 seeds only, £7.99 mixed | £9.99 | bare root | View at SuttonsOpens product page · Affiliate info |
| Van Meuwen £5.99 standard delivery | £9.99 | bare root | View at Van MeuwenOpens product page · Affiliate info |
| Paramount Plants Variable by postcode — calculated at checkout. Free to EN postcodes | £23.40 | bare root | View at Paramount PlantsOpens product page · Affiliate info |
Farmer Gracy
Flat rate per order. Free over £50. Ships from Netherlands
Size: bare root
Suttons
£6.99 for plants, £2.99 seeds only, £7.99 mixed
Size: bare root
Van Meuwen
£5.99 standard delivery
Size: bare root
Paramount Plants
Variable by postcode — calculated at checkout. Free to EN postcodes
Size: bare root
| Ashridge Trees From £7.95 depending on order size | £7.95 | Check retailer for size | View at Ashridge TreesOpens product page · Affiliate info |
| Crocus £5.99 flat rate per order | £9.74 | Check retailer for size | View at CrocusOpens product page · Affiliate info |
Ashridge Trees
From £7.95 depending on order size
Size: Check retailer for size
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: 8 May 2026
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Plant Information
About this plant
Delphinium Black Knight is a garden perennial that thrives in full sun. Growing to about 1.5m, it flowers from June and July. A reliable choice for pollinator-friendly gardens.
Latin Name
Delphinium 'Black Knight'
Family
Hardiness Zone
H7
Care Level
moderate
Sun Exposure
full-sun
Water Needs
moderate
Flowering Season
jun,jul
Mature Height
1.5m
Frequently Asked Questions
How much does Delphinium Black Knight cost in the UK?
Delphinium Black Knight prices in the UK range from £4.74 to £23.40 depending on pot size and retailer. The cheapest price is currently at Farmer Gracy at £4.74. Prices are checked nightly across 7 UK nurseries.
Where can I buy Delphinium Black Knight online in the UK?
You can buy Delphinium Black Knight from 7 UK nurseries including Farmer Gracy, Ashridge Trees, Suttons. ComparePlants.uk compares prices across all of them so you can find the best deal.
What is the scientific name for Delphinium Black Knight?
The scientific name for Delphinium Black Knight is Delphinium 'Black Knight'.
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