Euphorbia charachias grows wild on hot dry slopes on the southern European side of the Mediterranean and is one of the toughest plants for a dry climate garden. E. ‘Silver Swan’ is another selection from Notcutt’s nursery. Notcutt was prince of the rhododendron world when I was young now Notcutt is king of the Euphorbias. E. ‘Sliver Swan’ makes a tidy bush of creamy white and green variegated foliage and withred eyed cream and green flowers. 50cm x 50cm. Sun.