Answer:

Guava trees grow up to 26 feet (8 m.) in height. Cultivated trees are pruned back to 6-9 (2-3 m.) tall. If a tree has not been pruned, it usually flowers in fall. If the tree has been pruned, the tree will blossom 10-12 weeks after pruning with white, 1 inch (2.5 cm.) flowers. The blossoms yield small round, oval, or pear shaped fruits, or more accurately, berries. So whether or not your tree has been pruned decides when it blooms and when the guava tree begins fruiting. The period of time between flowering and ripening of the fruit is 20-28 weeks, depending on when the tree was pruned. Pruning isn’t the only factor which determines when guava trees fruit however. Guava tree fruiting is dependent on the age of the tree as well. So how long until guava trees produce fruit?

Read more at Gardening Know How: Guava Tree Fruiting: When Will My Guava Bear Fruit https://www.gardeningknowhow.com/edible/fruits/guava/guava-tree-fruiting.htm