Full sun to partial shade.
Varies by species. Most annuals will bloom from spring through fall, with a lull during midsummer.
Hummingbird havens, garden borders and groundcovers, rain gardens, woodland gardens, spillers in container combinations, pollinator gardens.
Very! They make up less than 10% of the plant kingdom. Blue lobelias are among this elite group, which also includes blue sea holly (Eryngium planum), Siberian larkspur (Delphinium grandiflorum), Lily of the Nile(Agapanthus africanus), Texas bluebonnets (Lupinus texensis), blue daisy (Felicia amelloides), and blue hydrangeas.