Plants: Get a selection of allium 'Purple Sensation bulbs. Easy to grow: An undemanding plant which also makes an excellent cut flower. Quantity: Choose between 24, 48 and 96 bulb plants. Blooms: Produces statement violet-purple starry flowers measuring up to 8cm (3") across on upright stems. Late-spring garden: Flowers only once in a season, however, the blooms are followed by skeletal seedheads for a spectacular autumn display. Size: With a height of up to 90cm (36") and spread of up to 10cm (4") at maturity. Allium 'purple Sensation' Plants | Living Social