1 Asclepias incarnata ‘Cinderella’ (#1): Swamp Milkweed is perfect for a moist spot or a rain garden; fragrant rose pink flowers on 3-4’ stems in July and August; flowers followed by attractive seed pods (to 4″long) which split open when ripe, releasing silky-haired seeds easily carried by the wind; flowers are very attractive to butterflies as a nectar source; plant also serves as a food source for the larval stage of Monarch butterflies; deep taproots; best left undisturbed once established; foliage slow to emerge in spring; native; zone 3; $9.