Botanical Interests Perennial Vivid red-orange that Blooms in Summer in Full Sun, Partial Sun to a height of 24″ tall, 24″ wide. Hardy in Zones 3-9,Attracts Butterflies. Butterflies will seek your garden out when you have this vigorous perennial, shrub-like plant. Asclepias particularly attracts the Monarch. Beginning in late spring, it produces a profusion of fiery, red-orange flowers followed by decorative green seed pods. Drought tolerant and is native to eastern United States.