A picture of a Great Lobelia

Great Lobelia

Lobelia siphilitica

Also known as

Blue Cardinal Flower, Blue Lobelia

Full Sun
Moderate care
Moderate watering
Frost Hardy

6a

USDA zone

-23°C

Minimum temperature

Expected size

Height
Spread

60cm

Max

35cm

40cm

Min

20cm

Flowering

  • spring
  • summer
  • autumn
  • winter

More images of Great Lobelia

A photo of Great Lobelia
A photo of Great Lobelia

Great Lobelia Overview

Dense spikes of bright purple flowers are produced in the summer and autumn. They love to be planted in moist soils making them ideal for bog gardens and waterside areas.

How to propagate Great Lobelia

Seed

Propagate annuals from seed in spring, perennial species from seed.

Division

Division in spring or autumn and perennial cultivars by division only.

Special features of Great Lobelia

Attracts bees

Other uses of Great Lobelia

Border, rock garden, wildflower/meadow, container, bog Attracts humming birds in suitable geographical locations.