Make sure the avocado tree is in well-drained soil. They will not do well and bear fruit if they're waterlogged. If the soil is inadequate, mound compost and soil around the base of the tree to create a better drainage system.
Transplant the avocado tree to a protected location if it is subject to high winds. This will damage the fruit and flowers, as well as make the tree's wood break. The best planting location is under the shade of another tree or near the north side of a building.
Fertilize the avocado tree four times per year once it is 1 year old. Young trees should not be fed. Use a balanced fertilizer with an equal ratio of nitrogen-phosphorus-potassium. If you have an older tree that won't bear fruit, give it a nitrogenous fertilizer in late winter and early summer.
Soak the roots well when watering an avocado tree. Let it dry out between waterings. Depending on your climate, this may mean watering every day or once every few weeks.
Cut off dead or diseased foliage and limbs. They could be spreading disease and preventing your avocado tree from bearing fruit. Use shears to cut where the unwanted wood meets healthy wood.