Sun to part shade; Average to moist mucky soil; Bright pink flowers in the summer this plant grows in wet meadows, riverbanks, and seepy hillsides. One of the best milkweeds for attracting monarch butterflies. Easy to grow in a rain-garden or other moist garden soil. Grows between 2-4' tall; Blooms July to August; This is the common variety of the plant found over most of its range; Zone 3-6; WV ecotype. // Seed packet, about 50 seeds. Germination requirements: 60 days cold, moist stratification.