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Lobelia siphilitica/Great Blue Lobelia, Blue Cardinal flower
A colony of Lobelia in full bloom
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A colony of Lobelia in full bloom
A close-up image of the bright blue flowers
Flowers in late summer
A mature clump of the Lobelia
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Scientific Name:
Lobelia siphilitica
Common Name:
Great Blue Lobelia, Blue Cardinal flower
Hardiness Zone:
4, 5, 6, 7, 8
Determine Your Zone
Height:
2- 5 feet
Spread:
1-2 feet
Bloom time:
Summer, Fall
Flower color:
Blue
Light Exposure:
Sun, Morning sun
Drainage:
Well drained, Moist
Rate of Growth:
Moderate
Water Requirement:
High
Maintenance Level:
Low
Susceptible to insects
and diseases:
No
Comments:
This is a great clump-forming perennialfor the cooler parts of the country. Otherwise might need more shade in warmer regions of the country. Tolerates a wide range of moist soil conditions. Bright blue flowers are borne on unbranched, leafy stalks. Used as a medicinal plant in early times. Excellent perennial for native plant garden, woodland garden and effective near ponds and streams. Self-seeding is common where growing conditions are favorable.