A cultivated lemon tree typically takes between three to five years from the time it is planted as a sapling or grafted tree to reach maturity and produce a reliable, full commercial harvest of fruit. Trees grown from seeds will take significantly longer—often anywhere from seven to fifteen years—and frequently fail to produce fruit that matches the quality of the parent tree due to genetic variability. Once a grafted tree reaches maturity around its fifth year, it can continue to yield abundant crops for decades under proper horticultural care, regular pruning, adequate watering, and balanced fertilization schedules.