This is Asclepias arenaria, also known as Sand Milkweed. Growing 3 feet tall this plant likes to live in full sun. This plant attracts bees, and butterflies, while it is resistant to deer. From late Spring to the middle of Summer this asclepia has light green blossoms. Asclepias in general are documented nectar sources for the Monarch, Orange-edged Roadside-Skipper, Dina Yellow, Carus Skipper, Eastern Tiger Swallowtail, and Falcate Metalmark butterflies. It is also the nectar source for the Clarks sphinx, and Milkweed Tussock moths. USDA Hardiness Zones 4 to 9.