Great blue lobelia forms upright clumps with blue tubular flowers from summer into early autumn, drawing bumblebees and other long-tongued bees.
- Height
- 45–122 cm / 1.5–4 ft
- Spread
- 30–46 cm / 1–1.5 ft
- Light
- Full sun / Partial shade
- Soil moisture
- Moist, well-drained / Wet
- Flowering
- Fall, Summer
- Foliage
- Deciduous
- Maintenance
- Low
- USDA zones
- 4a–9b
Planting
Choose fertile, loamy soil that stays moist or wet, ideally in partial sun. Full sun works where the soil remains consistently moist, including near ponds or streams.
Care
Keep the root zone moist. Divide established clumps in spring if you need more plants; it may also self-seed.
Before planting: Toxic if swallowed. Slugs and snails may damage the leaves.
Planting Great blue lobelia?
Find a landscaper nearby to help with planting and establishment.
Find a landscaperMore plants to explore
Sources & photo credit
Plant reference: NC State Extension Gardener Plant Toolbox. Content checked . Flowering seasons vary with local climate; USDA zones describe winter cold tolerance.
- Great blue lobelia: Joshua Mayer · CC BY-SA 4.0. Resized, converted to WebP and cropped for display.
- Cardinal flower: Marcia Boyle · CC BY 4.0. Resized, converted to WebP and cropped for display.
- 'Dilys' geranium: Krzysztof Golik · CC BY-SA 4.0. Resized, converted to WebP and cropped for display.
- Adam's needle yucca: Carl Lewis · CC BY 2.0. Resized, converted to WebP and cropped for display.