Lobelia siphilitica, Great Blue Lobelia

Tried and True Native Plant Selections for the Mid-Atlantic

Lobelias can be impressive, especially when dozens are growing together.  Great Blue Lobelia typically grows in moist to wet locations along streams, sloughs, swamps, and meadows.  Showy blue flowers are held on long flower stems and loved by hummingbirds and butterflies.

Print Version: Lobelia siphilitica, Great Blue LobeliaLobelia siphilitica (Great Blue Lobelia) Perennial Height: 1–5 feet Spread: 1–11⁄2 feet Bloom Color: Blue, violet Characteristics Clump-forming perennial Stiff, erect, unbranched leafy stems Serrated, lance-shaped, medium green leaves Light to dark blue, tubular two-lipped flowers (three lobes on lower lips, two on upper) on spike-like raceme bloom August to October May self-seed to form colonies Attributes Tolerates heavy shade and wet soil No serious pests (although slugs may eat leaves) or diseases; deer seldom severely damage Long bloom time Botanical name for its supposed efficacy in treating that disease Attracts mainly bumble and other long-tongued bees and sometimes butterflies and hummingbirds Growing and Maintenance Tips Soil Requirements: Humus-rich Light Requirements: Sun, Partial Shade Water Requirements: Moist, Wet Divide clumps by separating the basal offshoots from the mother plant in spring or fall as needed Use in perennial, native plant, and woodland gardens or near ponds and streams Hardiness: USDA Zones 4–9 Excellent Replacement for Lythrum salicaria - Purple Loosestrife Lythrum virgatum - European wand Loosestrife

 

Learn more about other Mid-Atlantic plants: Tried and True Plant Fact Sheets


Tags:Perennial, Height: 1–5 feet, Spread: 1–1½ feet, Bloom Color: Blue, violet, Clump-forming perennial, Light to dark blue, tubular two-lipped flowers (three lobes on lower lips, two on upper) on spike-like raceme bloom August to October, Tolerates heavy shade and wet soil, No serious pests (although slugs may eat leaves) or diseases; deer seldom severely damage, Long bloom time, May self-seed to form colonies, Attracts mainly bumble and other long-tongued bees and sometimes butterflies and hummingbirds, Soil Requirements: Humus-rich, Light Requirements: Full Sun, Partial Shade, Water Requirements: Moist, Wet, Divide clumps by separating the basal offshoots from the mother plant in spring or fall as needed, Use in perennial, native plant, and woodland gardens or near ponds and streams, Hardiness: USDA Zones 4–9, Lythrum salicaria – Purple Loosestrife