The dwarf orange tree is a container plant that adds beauty and fragrance to a patio or sunny indoor location. Dwarf orange trees reach a height of 3 feet when pruned yearly or up to 10 feet when left to grow naturally. The tree produces glossy green leaves. White, fragrant flowers appear just before the full-size oranges begin to grow. It is common for dwarf orange trees to produce fresh oranges two to three times a year when cared for properly.
Select a planting container that is 2 to 3 inches wider and the same depth as the tree's rootball. Plant the tree in the container with a mixture of equal parts sterile potting soil, peat moss and course sand.
Water the dwarf orange tree two to three times a week to keep the soil moist. Apply water to the soil until it runs out of the bottom drainage holes. Monitor the soil moisture during periods of hot weather, as container plants dry out faster than those planted in the ground.
Feed the dwarf orange tree a high-acid fertilizer once a month during the growing season and every three months during the dormant period. High-acid azalea or rhododendron fertilizer works well for dwarf orange trees. Follow the label instructions for dosage.
Monitor the leaf color on the dwarf orange tree, as yellow leaves indicate the soil pH is too high. Amend the soil by adding a mixture made of 1/2 tsp. magnesium sulfate with 4 cups luke warm water, if needed to correct the pH level.
Assist with pollination by brushing the open flowers with a paintbrush to loosen pollen. Brush the tree leaves with the paintbrush to move the pollen around the plant.
Place the tree in a sunny location that receives a minimum of eight hours direct sunlight each day. Set a dwarf orange tree grown indoors in a south-facing window. Bring the dwarf orange tree indoors for the winter months once the temperature consistently drops below 50 degrees F.
Remove damaged or dead branches just before the tree emerges from the dormant season. Leave the three strongest trunk stems to stimulate branch growth for fruit production instead of additional trunk stems.
Repot the dwarf orange tree into a larger container when the tree becomes rootbound, or approximately every three years. Choose a container that is 2 to 3 inches wider than the current container.