Perennial with Dense flower spikes of bright red blooms are definite hummingbird magnets. Makes a striking accent or border plant. Great in groups. Ideal for hummingbird gardens and waterside settings. Grows to 30″, prefers full sun to part shade. Prefers organic soil and moist conditions. Blooms in late summer. Bright red. 1/4 tsp. These seed are extremely tiny, so this is a lot of seed. Cardinal flower seeds are very small and germinate without pretreatment.