Citrus do not require significant pruning. During early tree development, it is important to remove suckers from the base of the tree. These shoots are likely to be the rootstock variety, will not produce desirable fruit, and will interfere with tree development if not removed. Mature citrus trees do not require pruning of the canopy for production or tree health except when substantial injury occurs following disease or freeze damage. Citrus do not require fruit thinning. Typical citrus trees go through three distinct periods of fruit drop. First, is the drop of about 70-80% of the flowers during and immediately following bloom. The second drop occurs a couple of weeks later, involving small fruit of pea-size to marble-size. The third drop occurs in late May, involving larger fruit, almost golf ball in size. Young citrus trees can be alternate-bearing. This means the tree may have one year of very good production, followed by zero production the next year. This is normal in young trees. As they mature, they will become more consistent and begin bearing every year.