Lobelia siphilitica
Blue cardinal flower, Great lobelia , Tall blue lobelia, Virginia bellflower, Vomit root
Lobelia Lobelia
L. siphilitica - L. siphilitica is an upright, clump-forming, herbaceous perennial with erect stems bearing ovate to broadly lance-shaped, toothed, softly hairy, light green leaves and dense racemes of tubular, two-lipped, blue flowers from late summer to mid-autumn.
Lobelia siphilitica is: Deciduous
Clump-forming, Upright
Severe discomfort may result if ingested
Blue in Summer; Blue in Autumn
Light green in Spring; Light green in Summer; Light green in Autumn
Slugs Slugs
May be prone to a virus
Crown rot Crown rot
Cut back after flowering.
Seed cam be sown as early as late winter.
Division, Seed
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Lobelia siphilitica (Blue cardinal flower) will reach a height of 0.7m and a spread of 0.4m after 2-5 years.
Beds and borders, City, Coastal, Cottage/Informal
Plant in deep, fertile, reliably moist soil in sun or partial shade. Best in partial shade except in cool, northern climates. May self-seed in optimum growing conditions.
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Moist but well-drained, Moisture-retentive
Acid, Alkaline, Neutral
Partial Shade, Full Sun
South, East, West
Exposed, Sheltered
Hardy (H4)
We do not currently have companion plants added for this plant.
Lobelia siphilitica
Blue cardinal flower, Great lobelia , Tall blue lobelia, Virginia bellflower, Vomit root
Lobelia Lobelia
L. siphilitica - L. siphilitica is an upright, clump-forming, herbaceous perennial with erect stems bearing ovate to broadly lance-shaped, toothed, softly hairy, light green leaves and dense racemes of tubular, two-lipped, blue flowers from late summer to mid-autumn.
Deciduous
Clump-forming, Upright
Severe discomfort may result if ingested
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Blue in Summer; Blue in Autumn
Light green in Spring; Light green in Summer; Light green in Autumn
May be prone to a virus
Cut back after flowering.
Seed cam be sown as early as late winter.
Division, Seed
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Lobelia siphilitica (Blue cardinal flower) will reach a height of 0.7m and a spread of 0.4m after 2-5 years.
Beds and borders, City, Coastal, Cottage/Informal
Plant in deep, fertile, reliably moist soil in sun or partial shade. Best in partial shade except in cool, northern climates. May self-seed in optimum growing conditions.
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Moist but well-drained, Moisture-retentive
Acid, Alkaline, Neutral
Partial Shade, Full Sun
South, East, West
Exposed, Sheltered
Hardy (H4)
Zone 9, Zone 8, Zone 7, Zone 6, Zone 5, Zone 4
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This plant likes... | Garden match | |
Soil types: | Chalky, Clay, Loamy, Sandy (will tolerate most soil types) | Tell us... |
Soil drainage: | Moist but well-drained, Moisture-retentive | Tell us... |
Soil pH: | Acid, Alkaline, Neutral | Tell us... |
Light: | Partial Shade, Full Sun | Tell us... |
Aspect: | South, East, West | Tell us... |
Exposure: | Exposed, Sheltered | Tell us... |
Hardiness: | Hardy (H4) | Tell us... |
By Devon garden designer Tom Simpson. The garden, designed by Tom, aged 28 from Kingswear near Dartmouth, showcases many of the attributes of a sustainable rain garden, treating water as a precious… read more
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