Arizona is known for its desert landscape and rugged mountain ranges. Cactus is a common desert plant variety; its prickly exterior is adaptable to the harsh summer weather and drought conditions of Arizona's desert regions. While many cactus varieties offer up spectacular and colorful flowers, there are other flowering plants that do well in Arizona.
Lantana is grown as a flowering ground cover, offering up blossoms in white, lavender and pink. They begin blooming in March, and will continue blooming until the arrival of frost. In desert regions of Arizona, such as Tucson or Lake Havasu City, they will stay evergreen, while the leaves may drop in cold regions, such as Flagstaff. Lantana thrives in the full sun and tolerates the heat.
Vinca is a hardy flowering ground cover that provides color to the garden even in the hottest of summer months. Each flower typically has five petals, and comes in a variety of shades, such as pinks, purples, blues and white. It is an evergreen plant.
The bougainvillea is grown as a flowering bush, yet what appear to be the colorful flowers are actually modified leaves or bracts, with tiny flowers in the center. The bracts come in a variety of colors, such as magenta, pink, red, purple, orange, yellow and white. Another bougainvillea variety is the torch plant, which also does well in Arizona.
While the oleander is known for being a poisonous plant, it also grows well in Arizona, providing both color and privacy screening to a garden. The oleander tolerates drought conditions and flower colors include pinks and white. Oleanders are susceptible to the oleander leaf scorch, which can kill the plant in about two years. Oleander leaf scorch is present in Arizona, as well as California and Texas.
Roses do well in many Arizona regions. Since humidity and dampness can bring on a variety of plant diseases that can ravage a rose garden, the warmer, dryer climate of Arizona is a natural defense to many rose aliments. While the rose bush enjoys full sunlight, it may need to be protected from the severe heat of summer with temporary shading.