Mexican Honeysuckle. Justicia candicans, Acanthus Family: ( Acanthaceae ), Mexican Honeysuckle. Also Called: Arizona Water-Willow, Orange Plume Flower, Adhatoda candicans, Jacobinia candicans, & Jacobinia ovata. We wish to thank Wikipedia, the free encyclopedia for some of the information on this page. We share images and information with Wikipedia. This is a very popular landscaping plant in arizona and it is considered a deciduous shrub. It is deciduous shrub up to about 4 feet in height, gray-green succulent plant, with tubular orange flowers, native to parts of Arizona & Sonora, Mexico. Hummingbirds are attracted to them. Quick Notes: Height: Evergreen bush slowly growing to about 3 - 4 feet tall and 4 - 6 feet wide. Flowers: The flowers are bright orange, tubular, to about 11/2 inches long. Flowering Time: Mid February - November. Leaves: The leaves are bright green, ovate, velvety pubescent, and up to 3 inches long. Found: The USDA claims Justicia spicigera is native of the USA (AZ). In Arizona it is native to Maricopa, Pima, & Santa Cruz counties. It is native to Mexico in almost all of Sonora. Hardiness: USDA Zone 8a: to -12.2 �C (10 �F) USDA Zone 8b: to -9.4 �C (15 �F) USDA Zone 9a: to -6.6 �C (20 �F) USDA Zone 9b: to -3.8 �C (25 �F) USDA Zone 10a: to -1.1 �C (30 �F) USDA Zone 10b: to 1.7 �C (35 �F) USDA Zone 11: above 4.5 �C (40 �F) Soil pH requirements: 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline) 7.9 to 8.5 (alkaline) 8.6 to 9.0 (strongly alkaline) Sun Exposure: Full Sun Elevation: 0 - 2,500 feet. Habitat: Alkaline, well-drained/light soils. An ideal landscape plant in Arizona. Miscellaneous: Flowering Photos Taken April 29, 2003. Glendale, Arizona. An ideal xeriscape landscape plant in Arizona.