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Lobelia siphilitica
Butterfly IconRock Garden Icon

Plant Type: Perennials

This native perennial plant is erect and usually remains unbranched. The central stem terminates in a long and slender raceme of blue-violet flowers. The blooming period occurs from late summer into fall, and lasts about 2 months. Sometimes plants produce white flowers, and other color variations are possible.

Currently not available for online purchase.

Growing & Maintenance Tips:

The preference is wet to moist soil and partial sun. Full sun is tolerated if the soil is consistently moist, and light shade is also acceptable. The soil should be fertile and loamy. This plant withstands occasional flooding, but becomes muddy and ragged-looking if it receives too much abuse. The small seeds require light to germinate.

Flower Color

Violet blue

Foliage Color

Plant Spread

24 in.

Good Companions

Plant Height

36 in.

Scape Height

Hardness Zone


Soil Moisture

Moist water needs

Characteristics & Attributes


Borders, Beds, Accent, Rock garden, Long-lasting bloom, Edging, Water Edge

Bloom Time

Summer into fall

Critter Resistance


Full to part sun

Growth Rate

Seasonal Interests