Calycanthus Duo Calycanthus Duo is an impressive duo of exotic-looking hardy shrubs that will be the perfect focal point for your outstanding garden this summer! Throughout June until the end of sunny August, this duo will provide an array of tropical magnolia-like blooms that are complimented by glossy green rich foliage! Reaching an equal height and spread of 400cm (157in) this low maintenance hardy shrub will bring fragrance, beauty and structure to your shady boarders or woodland areas! Sweet spice plants are known for their heavily fragrant flowers that will add a stunning scent to your outside space!