Lobelia siphlitica

Great Blue Lobelia or Cardinal Flower

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  • Erect habit with lavender- blue flower spikes in July- October
  • Moist to wet clay, loam or sandy soils in sun/ pt.shade
  • Tolerates drier locations than L. cardinalis
  • Natural habitat: moist woodlands, meadows, swamps
  • Attracts birds and hummingbirds
  • Special value to bumble bees and other native bees

Height: 36-48 in
Spread: 12-18 in

Zone: 3-8
Color: Blue

Characteristics & Attributes

Attracts Wildlife:

  • Attracts Humming-birds
  • Attracts Pollinators
  • Attracts Butterflies


  • Mass Planting
  • Native
  • RainGarden
  • Water's Edge / Bog Plant
  • Border or Bed


  • Sun/ pt.shade

Foliage Color:

  • Green


  • Upright

Season of Interest (Flowering):

  • Summer

Soil Moisture:

  • Average Water
  • Moist, Well-Drained
  • Water Garden

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