Genus: Lobelia

Lobelia

Photo/Illustration: 
Michelle Gervais
(Lobelia)
lo-BEE-lee-ah
Campanulaceae
Lobelia is a large genus of almost 400 species of annuals, perennials, aquatics, and shrubs from around the globe, but especially the Americas. There is great variability within the genus, but all species have 2-lipped, tubular flowers, often very brightly colored. Grow perennials in a border or at waterside, annuals as edging or in containers, and aquatics in a wildlife pond.
Noteworthy characteristics:  Brightly colored 2-lipped flowers. Most are native to the Americas. Plants often attract hummingbirds. The milky sap may cause skin irritation.
Care:  Lobelia need consistently moist, deep, fertile soil in full sun or partial shade.
Propagation: 

Sow seed of annuals in late winter at 55° to 64°F, and perennials at the same temperature as soon as seed is ripe. Divide perennials in spring. <em>L. cardinalis</em> can be propagated from bud cuttings in mid-summer.

Species, varieties and clutivars for genus Lobelia

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Cardinal flower
Lobelia cardinalis
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Blue cardinal flower
Lobelia siphilitica
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Lobelia Techno® Blue
Problems: 

Rust, smut, leaf spots, slugs.