Lobelia: Blue Cardinal Flower


Native plant valued for its late summer blue flowers, Great Blue lobelia is best in mixed border plantings behind shorter plants or allowed to roam freely in natural settings. 1" long blue flowers in late August are bunched tightly at the tips of the unbranched stems and last for about a month. For best results avoid hot sun locations and make sure the plant is kept evenly moist. Plays well with other natives such as Cardinal flower, Joe Pye Weed (Eupatorium) and Sedges (Carex).


  • Mature Height: 2-3 feet
  • Mature Spread: 12-18 inches
  • Spacing: 18 inches
  • Sunlight: Part Sun, Shade
  • Soil Type: Moist
  • Deer Resistant
  • Rabbit Resistant
  • Attracts Wildlife
  • Flower: Purple-Blue


Early in the season, many plants are pruned to encourage later fullness, and therefore may vary in size from the photo and size range. Rest assured, they hold the same glorious potential.

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