Asclepias humistrata Pink Veined Milkplant Bring bees, butterflies, and birds into your yard with this Pink Veined Milkplant. Growing up to 2 feet high, this butterfly attracting Asclepias humistrata is a great addition to any garden. These pale pink blossoms appear in mid Spring and stick around until mid Summer, but the leaves are the most beautiful aspect of this plant. Asclepias humistrata has normal water needs, but has been found in hot and drought tolerant conditions. Pink Veined Milkplant can be divided into bulbs when it is mature enough. USDA Hardiness Zones 3 to 8