Fouquieria columnaris, the Boojumtree or cirio. (Latin American Spanish: [ˈsiɾjo]) is a tree in the ocotillo family, whose other members include the ocotillos. BoojumTreeCare. By Bonnie Singleton, ContributorUpdated 3:31 p.m. Boojumtrees resemble an upside-down carrot. Care of the tree Fouquieria columnaris or Boojumtree.Boojumtree can be pruned in late winter to remove dry branches. Boojumtree is a distinctive desert plant with a tall, slender, columnar trunk, often resembling a candelabra. These vertical structures, branching near the top, adapt to arid conditions... BoojumTreeCare.Container boojumtreecare requires addendum nutrients to supplement the potting mix. Feed the plant in February with a balanced fertilizer diluted to half. Boojumtree. Fouquieria columnaris. Characteristics.The distinguished, rare, and slow-growing tree has an unusual growth habit and appearance with its tall and upright stature. The boojumtree is listed on CITES Appendix II, restricting international trade. Smugglers attempting to bring specimens into the US have been stopped at the US-Mexico border. However, a spring planting can be successful if care is given to shading the plant. Exposure: Boojumtrees grow best in full sun to part shade. Fouquieria columnaris. Common Names: BoojumTree.Plant Care Notes: • Sunlight: Prefers full sun for optimal growth. • Watering: Water thoroughly when the soil is dry to the touch. Boojumtrees are protected in their natural habitat, and wild harvesting is forbidden by the Mexican government.Cultivation Notes: Boojumtrees require very little water once established.