While pomegranate trees can be grown as far north as Washington D.C., they perform best in arid climates like that of Arizona. Arizona gardeners can plant several cultivars of pomegranate, including Wonderful, Spanish Ruby and Sweet Fruited. According to Arizona Cooperative Extension, Wonderful is the best producing variety for Arizona gardeners.
Select a sunny spot to plant your pomegranate tree. Purdue University notes that these trees grow well in either alkaline or acidic soil, so Arizona's naturally alkaline soil is fine for this tree. While gardeners can plant dwarf varieties in containers, true pomegranates grow 20 to 30 feet tall, so choose a site that offers enough space.
Dig a hole where you plan to plant the pomegranate, using your shovel. Make the hole twice as large as the plastic container holding your pomegranate tree.
Remove the tree from the plastic container. Massage the root ball with your hands to break apart the root ball. Separate any tangled roots. Then place the tree in the hole at the same depth as it was planted in the container. Spread the roots out in the soil with your fingers.
Fill the hole with soil without packing it down. Water the site thoroughly until the soil compacts around the base of your pomegranate tree and is saturated with water.
Continue to water the tree when the soil becomes dry until the ground is sodden.
Apply 2 pounds of 8-8-8 fertilizer to developing trees in November and March, according to Arizona Cooperative Extension. This nutrient boost helps improve plant growth and fruit quality. According to Arizona Cooperative Extension, mature trees need twice this amount of fertilizer on the same schedule.