This is a fantastic collection of popular varieties which produce spherical architectural flower heads in may and june perched on stiffly upright stems as the flowers fade attractive seed heads remain which become straw coloured as the season progresses persisting throughout autumn dot them among herbaceous perennials at the front of borders or in patio containers where they will attract bees and other pollinating insects supplied as bulbscollection comprisesallium hollandicum 39purpl