Check with your local nursery for seedlings, which are widely available. Cockscomb is easy to start from seed, too.
Plant seedlings 8 inches apart in full sun and well-drained soil.
Plant seeds indoors six to eight weeks before your region's last frost, then plant outdoors 8 inches apart.
Keep soil moist. Cockscomb does best in hot, slightly dry conditions, but will wilt if overly dry. Avoid wetting the flowers or leaves to prevent fungal diseases.
Fertilize every four weeks or so. Cockscomb benefits from regular fertilizing.
Pull out and discard in fall, once frost kills these plants.