Lobelia cardinalis, Red cardinal flower

Red cardinal flower
Lobelia cardinalis

Hardiness: Zones 3 to 9
Plant type: Herbaceous perennial
Height: 2- 4'
Spread: 1- 2'
Sun: Part shade
Water: Medium to wet
Bloom time: July to September
Bloom color: Scarlet red
Soil: Moist, organically rich soils, Neutral (≈7), Acid (<7pH).

Notes: Attractive to butterflies and hummingbirds, but not cardinals. Both cardinals and red cardinal flower are named for their red color resembling the red of Roman catholic bishops' robes.

More information on this plant here.