Blue Lobelia (Lobelia siphilitica)

Very similar to cardinal flower. Both are good choices for rain gardens.

 

Uses:  Rain gardens, bees, butterflies, hummingbirds

Bloom time:  September - October

 

Height:  18 to 30 inches

Space:  10 to 16 inches

 

Sun:  Full sun to light shade

Moisture:  Average to moist

Seed: Germinates fairly easily. The tiny seeds need light to germinate, so sow them on moist soil and don't bury them at all.