Best known as Roman Chamomile, Chamaemelum nobile is a useful medicinal herb. Aromatic feathery foliage forms a dense evergreen mat that will happily creep about the herb garden. Throughout the summer, this hardy perennial produces an abundance of white daisy blooms that may be dried for pot pourri or making your own chamomile tea. Height: 30cm (12). Spread: 45cm (18).