One of the most frustrating things about growing fruit trees is that they may not produce the amount of fruit you want, or the luscious size you desire. This happens a lot, especially with first crops from fruit trees. There are a couple things you can do to try to increase the amount of your orange tree crops, as well as encourage quick, new growth on the tree.
Pick a tree that is known for growing well in your area and is well-adapted. For example, in Texas, South America, Africa and Florida, Valencia oranges grow great. Washington navel oranges are ideal to grow along the West coast.
Make sure to plant the orange tree in a well-drained area with full sun. An extra tip: Don't plant it in alkaline soil. Mulch the orange tree to help move water through the soil and distribute nutrients, and water the tree every week and a half to two weeks if you live in a dry area.
Use the pruning shears to thin out the orange tree while it's young. This is called "fruit-thinning." It will encourage new growth. Remove the smaller fruits early on, removing about one-third of the baby fruits to encourage larger, plumper oranges.
Space out the fruit on the orange tree so each one gets enough nutrients and space to grow. This is called "fruit-spacing." When you are thinning out the oranges in the prior step, try to make sure each fruit is spaced out at least six inches away from the next one. If your orange tree is weighed down with fruit, it will just make the oranges grow small and not very juicy, even though they may look good.