(Milkweed) Layer your garden with Asclepias ‘Silky Deep Red’ and other Milkweed for a Monarch Butterfly paradise. ‘Silky Deep Red’ Forms an upright, long-blooming clump with eye-catching bi-colored blooms. Standing 3-4 feet tall and spreading up to 3 feet wide, Asclepias “silky Deep Red’ features clusters of red buds that open to bicolor red and yellow blooms. Planted in full sun, ‘Silky Deep Red’ prefers medium to well-drained soils. Easy to grow and a must have plant for Monarch Butterflies to thrive in your garden. Milkweed is the only host plant for the Monarch Butterfly. The eggs are laid on the foliage and once they hatch, the leaves become the food for the caterpillars. Hardy in zone 10-11, Asclepias ‘Silky Deep Red’ is a long-blooming annual in the rest of the country. Plant as a specimen or in mass and watch the flutter of butterflies in your garden.