Cardinal bloom time is around July to September. The blooms rise above the leaves 3 to 4 feet, and the plant will spread 1 to 2 feet. These plants will self sow but division in spring or fall is a better way to ensure you'll have an abundant supply of red flowers year after year.

Is the cardinal flower invasive?

non-invasive. native to North America - Wet places in eastern North America.

Do Cardinals reseed themselves?

Allowing your cardinal flowers to reseed themselves is ideal. This ensures that they will continue to come back every year full and beautiful.