Do Lobelia Flower Every Year. More than 360 species of lobelia are grown as annuals perennials or shrubs. Similarly you may ask do Lobelia come back every year.
The tiny five-petaled flowers bloom in shades of blue purple rose. Northern gardeners will have to plant these Lobelias in containers and bring them indoors before any danger of frost. Deadhead any spent blooms to encourage more blooms and to keep the plant well groomed.
Perennial plants come back each year and remain a constant in your garden.
Annual lobelia will grow nearly anywhere. Edging lobelias Lobelia erinus and their hybrids are tender perennials grown as warm-weather garden annuals. Eventually the plant will die out but should reseed. Their transport tissues arent designed to function under extreme heat so leaves often brown and curl up from the outer edge inward when its too hot.