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Great Blue Lobelia

Lobelia siphilitica

Spikes of vivid blue tubular flowers in late summer. Pair with Cardinal Flower (Lobelia cardinalis) for a dramatic blue-and-red display.

Family

Campanulaceae

Type

wildflower

Lifespan

perennial

Height

2–3 ft

Spacing

1–1.5 ft apart

Light

sun, part shade, shade

Soil moisture

moist

Soil pH

acidic, neutral, alkaline

Bloom

July, August, September, October

Bloom colors

blue, purple

Wildlife value

songbirds

Landscape uses

border, rain garden

Native states

AL, AR, CO, CT, DC, DE, GA, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, NC, ND, NE, NH, NJ, NY, OH, OK, PA, SC, SD, TN, TX, VA, VT, WI, WV, WY