Check out seedlings at your local nursery. Heliotrope also often is sold in hanging baskets so the flowers can be suspended at nose level.
Plant seedlings outdoors in full sun and well-drained soil after all danger of frost has passed. Space anywhere from one to two feet, depending on the ultimate height of the plant.
Give just moderate water; too much decreases the plant's scent.
Fertilize every four to six weeks. Heliotrope isn't a heavy feeder, but does best with plenty of nutrients.
Trim off spent flowers to encourage more blooms.
Pull out and discard plants once fall frosts kill them.