Heirloom Herb. Sacred to the ancient Romans, sage seeds produce a fragrant, slightly bitter herb plant used extensively for flavouring meats, soups, omelettes and cheese dishes. Another member of the mint family. Sage seeds grow greyish coloured leaves that are used either fresh or dried. Flowers shade from blue to purplish-blue in colour. Plants can grow to 60 cm (2′) tall and can spread out at least as wide. Mature plants often become woody so prune out some of the older wood to stimulate new, tastier growth.