LOBELIA SIPHILITICA / GREAT BLUE LOBELIA

LOBELIA SIPHILITICA / GREAT BLUE LOBELIA

A Native Perennial with Showy Blue Late-Summer Blooms

Lobelia siphilitica, commonly known as Great Blue Lobelia, is a native perennial valued for its tall spikes of rich blue flowers that bloom from late summer into early fall. Thriving in full sun to partial shade with moist to wet soils, Great Blue Lobelia adds bold color, vertical interest, and excellent pollinator support to rain gardens, wet meadows, and naturalized landscapes. Its late-season blooms provide important nectar when many other plants have finished flowering.

Why Choose Great Blue Lobelia?

Pollinator Friendly: Flowers attract bees and other beneficial insects.
Late-Season Color: Provides vibrant blue blooms in late summer and early fall.
Moisture Loving: Ideal for rain gardens, stream banks, and consistently moist areas.
Native & Hardy: Well-suited for naturalized and restoration plantings.

Key Features:

Foliage Color: Medium green, lance-shaped leaves.
Flower Color: Deep blue to violet-blue tubular flowers on upright spikes.
Height and Spread: Typically grows 2–4 feet tall and 1–2 feet wide.
Hardiness: Hardy to USDA Zones 3–9.
Sunlight: Prefers full sun to partial shade.
Soil Requirements: Moist to wet soils; tolerates clay and loam.

Specifications:

Plant Size: 2–4 feet tall, 1–2 feet wide.
Growth Habit: Upright, clump-forming perennial.
Hardiness: USDA Zones 3–9.
Flowering: Late summer to early fall with blue blooms.

Ideal Uses:

Rain Gardens & Pond Edges: Excellent for wet and moisture-retentive areas.
Pollinator Gardens: Supports bees and other late-season pollinators.
Borders & Moist Garden Beds: Adds height and striking color.
Naturalized Landscapes: Perfect for wet meadows and restoration projects.

Great Blue Lobelia is a striking and ecologically valuable native perennial. Its vivid blue flowers, moisture tolerance, and late-season bloom time make it an excellent choice for rain gardens, pollinator plantings, and naturalized landscapes.