Getting fruit trees to grow fast is not necessarily difficult, but may not be advisable in all situations, because fruit growth may suffer. Still, if growth acceleration is a priority, it is important to keep the tree as free from stress as possible. This allows the tree to spend its energy growing new tissue, instead of fighting potential infection and conserving energy. Any stress, including disease, lack of light or water, can lead to not only stunted growth, but also slower growth.
Plant only apple tree cultivars that grow in your particular USDA Plant Hardiness Zone. Trees that are at the outer limits of their growing regions may not grow as robustly as those in more comfortable environments.
Choose a location optimum for the tree. Most fruit trees, such as apples, pears and citrus, prefer an environment where they have full access to the sun, which produces the sugars they need for optimum growth.
Water newly-established trees every day for the first three months. Ensure the tree receives at least 2 to 3 inches of water each week, advises the North Carolina State University Extension. Newly-transplanted trees do not have the ability to dig deep down into the soil like many other trees, and therefore growth can be stunted if not watered daily.
Prune the tree annually in the late winter or early spring. Unwanted branches continue to grow, which takes energy away from other desired branches and vertical growth potential.
Thin the fruit when it reaches the approximate size of a dime, which is typically in the late spring or early summer. Too many fruit can weaken the tree and result in slower growth.
Apply a fertilizer that is heavy in nitrogen or a balanced fertilizer product. Fertilizers with nitrogen promote green vegetative growth in plants, and therefore the element helps to accelerate the growth of the trees.
Aerate annually in the spring or fall. Aeration helps promote root growth and gives those roots easier access to oxygen.