Stately upright plants, with tall flower spikes that rise above clusters of long narrow leaves.
The tender (half hardy) varieties of Lobelia bear little resemblance to perennial forms. These varietes are mainly used in bedding displays and hanging baskets. For details see Half Hardy Lobelia.
Family: Campanulaceae (bellflower
Botanical Name: Lobelia
Foliage: Deciduous narrow leaves.
Flowers: In shades of (depending on variety).
Flowering Period: Late summer to early autumn.
Soil: Any good moist fertile soil (chalk, clay, sand or loam). Any pH.
Conditions: Best in full sun but will tollerate some shade. Plant in a south, east or west facing aspect, in an sheltered possition.
Habit: Upright bushy.
Type: Herbaceous perennial.
Hardiness: Most varieties are fully hardy in all of the UK.
Plant in full sun or partial shade in deep, fertile, moist soil (do not allow soil to dry out).
These plants can be short-lived, so regularly rejuvinate your stock by division or cuttings.
Remove faded flower spikes in the autumn.
Susceptible to attack by slugs and snails. Can be affected by crown rot and a virus.
Propagate by division in spring.
L. cardinalis, has red flowers. Height to 2.5ft (75cm).
L. siphilitica, has long sprays of blue flowers. Height to 3ft (90cm).