Dwarf pomegranate trees such as the Nana variety, flower and produce edible fruit just like their full-size counterparts. Pomegranate trees thrive in warm, sunny and relatively dry climates and will perform poorly or not fruit at all if these basic environmental needs are not consistently met. Also, like full-size trees they will only begin to bear fruit once mature and well established in the soil. According to the University of Georgia, you should allow a minimum of a year from planting but more commonly three years from planting before edible fruit will consistently develop. Typically, the trees produce mature fruit for harvest five to seven months from flowering.
Provide your dwarf pomegranate with a growing location of full sun to light partial or filtered shade daily. Lack of daily sun will inhibit fruit development.
Keep the tree indoors or outdoors where temperatures remain above 40 degrees F for best fruit development. Keep the ambient humidity low to mimic its natural arid growing climate and encourage healthy fruit set.
Water your dwarf pomegranate consistently to support fruiting. Water recently planted trees once or twice per month when it doesn't rain. Keep the soil evenly moist, but not persistently soaking wet.
Fertilize your dwarf pomegranate for the first two years after planting, in the spring. Scatter 2 to 4 oz. of ammonium sulfate or an alternative high-nitrogen fertilizer, such as 15-5-5, around the root zone, away from the trunk and water in well.
Apply a 2-to 3-inch layer of compost or aged manure once or twice each year to feed the soil gently and boost fertility. Scatter the organic matter evenly around the root zone of the tree to just past the drip line of the canopy, but do not mound around the trunk.