How Long Do Lobelia Flower. Fiery red flowers are a favorite source of nectar for hummingbirds. 15022020 More than 360 species of lobelia are grown as annuals perennials or shrubs.
They survive winters in US. Blue lilac-pink purple white cherry-red. 19032010 The germination can take 14-20 days.
Cardinal flower Lobelia cardinalis is a perennial species hardy in USDA zones 2 through 8.
This plant grows 2 to 3 feet tall and produces spikes of tubular red flowers. 3 to 4 feet. Water the plants deeply and feed them with a liquid fertilizer every two weeks. 26062020 Lobelia blooms very well during cool spring weather usually between early and late spring but it will begin to die back during the hotter days of.