About Great Blue Lobelia

Striking spikes of vibrant blue flowers bloom from late summer to fall, adding bold color to any garden. This deer-resistant, moisture-loving perennial thrives in USDA zones 3-9 and attracts pollinators.

Growing Zones

Great Blue Lobelia (Lobelia siphilitica) grows in USDA Hardiness Zones 4–9. It thrives in full sun part shade and reaches 2–3 feet tall.

Is Great Blue Lobelia Safe for Dogs?

Great Blue Lobelia may be toxic to dogs. Consult your veterinarian if ingestion is suspected. ASPCA Animal Poison Control: (888) 426-4435.

Is Great Blue Lobelia Safe for Cats?

Great Blue Lobelia may be toxic to cats. Consult your veterinarian if ingestion is suspected. ASPCA Animal Poison Control: (888) 426-4435.

Is Great Blue Lobelia Deer Resistant?

Great Blue Lobelia is not rated as highly deer resistant and may be browsed by deer, especially when young or in areas with high deer pressure.

Does Great Blue Lobelia Attract Pollinators?

Great Blue Lobelia attracts bees and pollinators and butterflies and hummingbirds, making it an excellent choice for pollinator gardens.

How to Care for Great Blue Lobelia

Great Blue Lobelia grows best in full sun part shade with high water needs. Plant in USDA Hardiness Zones 4–9 for best results. Prune after flowering to maintain shape and encourage repeat blooms.