Growing Guide How To Grow Lemon Grass From Seed: The Lemon Grass ornamental thrives in moist soil and full sun, growing 36 - 60 inches tall. Grow in containers so that the plant can be moved indoors during winter. It is a tropical perennial grown as an annual in most parts of the United States. It is not tolerant of frost and any heavy frost will kill it. Sowing Lemon Grass herb seeds indoors is recommended for optimum germination rates. Sow the ornamental grass seeds on the surface of the soil and press gently into the soil. Cover Lemongrass seeds lightly with peat moss. Transplant outdoors after plant has reached a height of 6 inches. Seed packets , Organic seeds , Garden seed kits , Heirloom seeds , Non-GMO seeds , Vegetable seeds , Flower seeds , Herb seeds , Seed starter kits , Bulk seeds , Fast-growing seeds , Seed planters , Annual seeds , Perennial seeds , Indoor seed kits , Seed catalog , Microgreen seeds , Wildflower seeds , Seed subscription box , Seed tray sets