Valencia orange trees are grown worldwide. Being one of the sweetest and juiciest types of orange, they are delicious to eat and to use for juicing. Valencia orange trees are only hardy between zones 8 and 11, but they do grow well in climates that are drier than their native habitat of India. Because all citrus trees are tropical by nature, one of the most important aspects of growing Valencia orange trees is proper irrigation.
Dig a shallow hole around the base of the Valencia orange tree. Make the hole about 3 to 4 inches deep and 6 to 8 feet in diameter.
Line the edges of the hole on the inside with rocks, stones or thick plastic sheeting to keep the water inside the hole.
Fill the hole with water and let it soak down to the tree's roots. Allow the surface of the ground to dry out before repeating and filling the hole with water again.
Use the moisture meter to check the moisture of the soil around the roots of the Valencia orange tree. Take the moisture measurement when the surface soil is dry. Push the meter into the ground to the depth of the roots and pull it out. If it indicates the roots are dry, water the tree.
Water 1-year-old Valencia orange trees about once a week. Water Valencia orange trees 2 years and older once every two to three weeks. Water the tree more often if there is a dry spell.