Rosemary is a perennial herb that grows upright into a profusion of fragrant needle-leaves. 2-3 weeks before your last frost, scatter seeds on top of a moistened, well-drained, potting soil. Keep soil covered with a clear top to maintain moisture and allow light in while maintaining 80º while seeds are germinating (which can take up to three weeks). Transplant when seedlings are 3" tall and soil temperatures are above 55º. Once established, allow the soil to dry between waterings - does not like wet feet.