Lobelia siphilitica

Full Sun
Soil Type:
Moist But Well-Drained

See full plant description below.

Plant Details

Spreading clumps of tidy foliage and spikes of clear mid-blue flowers all summer.

Moist soil preferred and will tolerate it quite wet. Good for pond edges but will cope with any soil which doesn't get too dry.

Named after the disease it was once used to treat. Introduced from North America in 1665.

Height: 80cm

Common name(s): Blue Cardinal Flower; Great Lobelia.

All our plants are supplied in at least 9x10cm pots. Plants in this size pot establish quickly in the garden and often outpace plants planted in bigger pots at the same time. We do not sell 'plug plants' because those need to be grown on before planting. Our potted plants can be planted immediately, unless otherwise noted, or you can leave them in their pots until you are ready to plant. We grow everything we sell ourselves, in our nursery in the Buckinghamshire countryside.