Sky Blue ,Aparajita Blue ,Butterfly Pea seeds, blue pea, butterfly pea, commonly called butterfly pea vines are suitable for growing in USDA plant hardiness zones 10 and 11, but you can grow the vines as annuals if you live in a cooler climate. These are easy to grow from seed, either by planting directly in the garden in spring, or by starting them indoors about 12 weeks ahead of time. Lightly nick or scrape the seeds, and then let them soak overnight in room temperature water before planting. Seeds start in two to three weeks.