Oranges originated in China, then spread to Europe and finally to North America. The trees grow up to 30 feet tall, with green leaves and white flowers. The fruit ranges from 2 to 4 inches in diameter. Choose from dozens of varieties. Some are considered early season cultivars because they grow fruit before December. Their late season counterparts bear fruit in March. Many ways exist to orange trees grow bigger.
Plant orange trees in full sun for maximum fruit production. They will do okay in partial shade but will grow largest in a sunny location.
Water orange trees more during prolonged dry spells. They need about 40 to 45 inches of water yearly. Orange trees may grow smaller and produce less fruit if they dry out.
Protect orange trees from cold spells because frost can destroy orange blossoms. Place a blanket over the tree in a tent-like fashion, with a burning light bulb inside to generate heat. You can also put large containers of water around the plant.
Remove water sprouts from the bottom of orange trees because they steal nutrients from the rest of the tree. Snip them off with pruning shears. Also, prune branches that grow within 1 foot from the ground.
Fertilize orange trees to make them grow bigger. Use a balanced blend of nitrogen-phosphorus-potassium shortly after planting. Use the recommended amount, as stated on the label. Water the tree to help the fertilizer soak into the roots.