What can I do to make my oranges larger?
Certified GKH Gardening Expert
Thinning is one option. If there is an abundance of fruit on the tree, thinning them out will allow the remaining fruits to grow larger.
Take a look at fertilizing practices as well, which may also require a soil test. Use a higher phosphorous fertilizer early in the season. This will result in more flowers, which brings more fruit. Then, once fruit starts to develop, use a higher nitrogen fertilizer, as this will result in larger fruit.