Aeonium arboreum v. atropurpureum 'Zwartkop' is a cultivar that has been propagated widely for its magnificent dark burgundy leaves. This unusual cristate form produces stems that begin to grow laterally, producing fan shapes topped with dense burgundy leaves. Cristate forms generally occur when injury occurs to the plant at a young age (this damage can be due to insects eating the growing tip, or from many other causes, including a genetic predisposition). In reaction to the "injury", the cells at the tip of the branch where growth occurs begin to multiply at a much faster rate and the normal growing tip "goes crazy", creating fantastic whorls and fans. Can be used for dramatic foliage accent on the patio or in landscapes in temperate areas. Porous soil with adequate drainage. Filtered light and ample airflow. Water thoroughly when soil is dry to the touch. Summer dormant; preferable to provide cool shade during dormancy. Protect from frost. They are native to the Canary Islands.