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Great Blue Lobelia
Lobelia siphilitica
PerennialGreat Blue Lobelia
Lobelia siphilitica
Tap to flip backGrowing Conditions
Light
Sun – Part Shade
Water
Moist – Medium
Soil
Clay, Loam
Size
2-3'
Bloom
Blue, Aug–Sep
Why Grow It
Shade Tolerant
Grows well in partial to full shade
Rain Garden
Thrives in wet areas & manages runoff
Pollinator Magnet
Attracts many types of pollinators
Did You Know?
One of the few plants with true blue flowers — a rare and prized color in the garden.
Hummingbirds visit it just like Cardinal Flower — they're close cousins.
Short-lived perennial that self-seeds freely — let seedlings fill in naturally.
Wildlife Value
🐦
Hummingbird Magnet
Ruby-throated hummingbirds visit the tubular blue flowers regularly
🐝
Bumblebee Favorite
Long-tongued bumblebees are the primary insect pollinators
Good Companions
🌸 Cardinal Flower
🌿 Blue Vervain
⭐ Turtlehead
Planting Guide
- Plant in part shade to sun in moist, humus-rich soil
- Space 12–18″ apart; keep soil consistently moist
- Let it self-seed — individual plants are short-lived but colonies persist
Plant Details
Made with ♥ by Lu Li