Owners must train pomegranates and remove succors in order to grow them into a tree shape; otherwise, they take the form of a shrub. Suppliers ship the plants in pots, and they require transplanting in a sunny location. Pomegranates can survive to temperatures of 10 to 18 degrees Fahrenheit.
Most pomegranates in the United States grow in Florida and California. They do best in U.S. Department of Agriculture plant hardiness zones seven to 10. In California, some plants are more than 200 years old.
Pomegranates do well in a slightly acidic soil with a pH between 5.5 and 7. If planting several pomegranates for an orchard, the grower should space the plants at 15- to 18-foot intervals.
Pomegranates require up to 60 inches of water annually. The grower should monitor the soil as the plant nears its harvest time and keep it evenly moist to prevent the fruit from splitting.
Once the plant reaches approximately 2 feet in height, the grower should remove all but the five strongest branches of the plant and shorten the shoots annually for the first three years so they grow stronger. After the plant reaches this age, it only requires removal of dead branches to take a tree shape but requires monitoring for pests, such as aphids.