Red Yucca. Hesperaloe parviflora, Agave Family: ( Agavaceae ), Red Yucca. Also called: Red False Yucca, Red-flowered Yucca, Redflower False Yucca, Hesperaloe parviflora var. parviflora, Yucca parviflora. 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 will grow just about anywhere in Arizona. It is not native to Arizona, but since it is so popular in Arizona landscaping, we are including it on the Arizona Wildflower Web Site. An evergreen perennial to 4 feet tall, flower stalk to 6 feet, plant spreads to 6 feet wide Hummingbirds are attracted to it. Quick Notes: Height: Evergreen bush or shrub slowly growing to about 4 feet tall and 6 feet wide. Flowers: The flowers are bright red, tubular, to about 1 1/4" long. Flowering Time: April - November. Leaves: The leaves are long and narrow stiff 3' - 4' long x 1 �" wide, gray green leaves, forming from a central base, arching up and out, with fibrous margins. Found: According to the USDA it is native to the USA (TX). It is also found in Northern Mexico in northeastern Sonora, & northern Chihuahua. Hardiness: USDA Zone 5a: to -28.8 �C (-20 �F) USDA Zone 5b: to -26.1 �C (-15 �F) USDA Zone 6a: to -23.3 �C (-10 �F) USDA Zone 6b: to -20.5 �C (-5 �F) USDA Zone 7a: to -17.7 �C (0 �F) USDA Zone 7b: to -14.9 �C (5 �F) 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) Soil pH requirements: 5.1 to 5.5 (strongly acidic) 5.6 to 6.0 (acidic) 6.1 to 6.5 (mildly acidic) 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 - 6,000 Feet. Habitat: On well drained, rocky sandy desert, and gravel slopes in the desert mesas and rocky foothills. Also used as a great xeriscape landscape plant! Found on the Sonoran Desert of western Arizona & northern Mexico. Will grow in southeastern California, & southern Nevada. Miscellaneous: Flowering Photos Taken April 29, 2005. Glendale, Arizona. The Javelina or Peccary will eat these down to the roots! Fence your yard! In Arizona, they will grow in Flagstaff, which can get to -20 F.