Thyme (thymus vulgaris) This aromatic and long-lived perennial is a mainstay of American and French cuisine. Thyme leaves are small but pungent and can be used fresh or dried in almost any dish. The plant is a small, many branched evergreen with light pink to purple flowers. Thyme is very easy to grow, your seeds will germinate in a week. You can start harvesting the leaves about 8 weeks later. Certified Organic!