Globe thistle (Williton)

1 large plant in a sack, grows to 1.5-2m/5-6', handsome silvery dissected leaves, tall flower stems with metallic blue globe-shaped flowerheads, beloved of bees and other pollinating insects. Needs space as it will form a clump. May need staking in windy locations. Architectural plant, will die down in winter to a rosette of leaves, leaving the stems and seedheads to be beautified by frost!