With spikes of true blue, tubular, flowers on strong stem and finely-toothed, lance-shaped, light green leaves. Harmful if eaten. Potential skin and eye irritant.
Lobelia siphilitica
Blue cardinal flower
Details
| Aspect | Sun or part shade |
| Flower Colour | Blue |
| Flowering Period | Jul | Aug | Sep |
| Foliage | Not evergreen |
| Goes Well With | Astilbe, Filipendula, Ligularia |
| Growth Habit | Clump-forming |
| Hardiness | Fully hardy |
| Height | 1m |
| Soil | Moisture-retentive |
| Spread | 30cm |
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