- Cardinal Flower-Lobelia cardinalis Hardy Planting Zones- 3-9 Sun or Shade – Partial Shade to Full Sun Mature Height - 3-4' Mature Width- 1-2' Bloom Season – Summer to Fall (July-September) Gardener Status- Novice
Red Cardinal Flower
The single most outstanding features of the cardinal flower are its intensely red tube-shaped flowers. These blooms, ordinarily one-and-a-half inches wide, offer an intriguing appearance with three large lobes extending from the bottom of the tube while two tinier portions protrude above. Thanks to the work of breeders, rose and white colors are also available. The flowers dot two to four foot high slender stalks and open from July through September. Below, the herbaceous base consists of dark green leaves about eight inches long. Cardinal flowers enjoy fertile, moist soils and can even take brief flooding.