Lobelia (Perennial)


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 family)
Botanical Name: Lobelia
Common Names:

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 a sheltered position.

Habit: Upright bushy.

Type: Herbaceous perennial.

Hardiness: Most varieties are fully hardy in all of the UK.

Planting and Growing Lobelia

Plant in full sun or partial shade in deep, fertile, moist soil (do not allow soil to dry out).

Taking Care of Lobelia

These plants can be short-lived, so regularly rejuvinate your stock by division or cuttings.

Pruning Lobelia

Remove faded flower spikes in the autumn.

Pests and Diseases

Susceptible to attack by slugs and snails. Can be affected by crown rot and a virus.

Propagating Hardy Lobelia

Propagate by division in spring.

Popular Varieties of Hardy Lobelia Grown in the UK

L. cardinalis, has red flowers. Height to 2.5ft (75cm).

L. siphilitica, has long sprays of blue flowers. Height to 3ft (90cm).