Plant Calculator

Enter the approximate length and width of the area you will be planting and click 'Calculate' to determine how many Lobelia siphilitica you will need.

Approx. Length (ft):
Approx. Width (ft):
*Distance Between Plants (in):

*Correct and successful spacing is complex and depends on project conditions.

Lobelia siphilitica

Cardinal Flower

  • Showy spikes of blue flowers in late summer
  • Good for wet soil conditions
  • Deer resistant

  • Category: Perennials
  • Hardiness Zone: 4-9
  • Height: 2-3 ft
  • Spread: 12-18 in
  • Bloom Color: Blue
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Attracts Wildlife
Attracts Hummingbirds
Critter Resistance
Deer Resistant
Exposure
Full Sun
Partial Sun
Foliage Color
Green
Soil Moisture
Moist, Well-Drained
Attributes
Border or Bed
Fast Growing
Vigorous
Woodland Garden
Habit
Upright
Season of Interest (Flowering)
Fall
Summer
Season of Interest (Foliage)
Summer Bloomer