Lobelia siphilitica

Great Blue Lobelia

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Item #: 361

Zones: 5a to 9b, at least

Dormancy: Evergreen

Height: 30" tall

Culture: Sun to Light Shade

Origin: United States

Pot Size: 3.5" pot (24 fl. oz/0.7 L)

The great lobelia is the little known sibling to the gaudier L. cardinalis. With a similar growth habit, L. siphlitica forms a winter rosettte, which lenghtens upwards in spring, ending in a 30" stalk of lavender blue flowers in August and September. L. siphlitica grows best in moist to damp soils, although it is quite tolerant of short periods of drought.