Rosemarinus officinalis A stately rosemary and the tallest of its kind, Tuscan Blue forms a striking upright evergreen, reaching up to 6 feet tall and 4 feet wide. Strong woody stems and richly aromatic foliage provide year-round texture and fragrance, while pale blue, fragrant blooms appear in very early spring, heralding the season’s start. Ideal for hedges, back borders, topiaries, or display gardens, this vigorous variety is as useful as it is beautiful. With its classic rosemary flavor and bold presence, Tuscan Blue is both a culinary staple and a landscape showpiece. Hardy to zones 6–10.