Illustration. See the retailer's page for photos of the actual plant.
Lobelia siphilitica (Blue cardinal flower)
Lobelia siphilitica
Price comparison:
£24.99
From 1 UK retailer
Sun
⛅ Partial Shade
Water
💧💧 Moderate
Hardiness
🌡️ H5 (Hardy -10°C)
Flowers
🌸 aug,sep,oct
Compare Prices
Prices from 1 retailer
Prices last checked: 24 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.
| Retailer | Price | Pot Size | Action |
|---|---|---|---|
| Crocus £5.99 flat rate per order | £24.99Check availability at retailerChecked 24 Oct | 1L | View at CrocusOpens product page · Affiliate info |
Crocus
£5.99 flat rate per order
Size: 1L
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: 24 Oct 2026
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Plant Information
About this plant
Latin Name
Lobelia siphilitica
Family
Hardiness Zone
H5
Care Level
moderate
Sun Exposure
partial-shade
Water Needs
moderate
Flowering Season
aug,sep,oct
Mature Height
Frequently Asked Questions
How much does Lobelia siphilitica (Blue cardinal flower) cost in the UK?
Lobelia siphilitica (Blue cardinal flower) prices in the UK range from £24.99 to £24.99 depending on pot size and retailer. The lowest price we track is £24.99 for a 1 litre pot at Crocus. Prices are checked nightly across 1 UK nurseries.
Where can I buy Lobelia siphilitica (Blue cardinal flower) online in the UK?
You can buy Lobelia siphilitica (Blue cardinal flower) from 1 UK nurseries including Crocus. ComparePlants.uk compares prices across all of them so you can find the best deal.
What is the scientific name for Lobelia siphilitica (Blue cardinal flower)?
The scientific name for Lobelia siphilitica (Blue cardinal flower) is Lobelia siphilitica.
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