How often to water will vary on the environment and depends on soil porosity, tree size, and
temperature. Allowing the top of the soil to dry out between watering is recommended. A
simple moisture meter, available at garden supply stores, can be used to determine moisture
down to about a 9” depth. Generally, when the meter indicates a root moisture level of about
50%, (center of the dial) it is time to water. Always store your moisture meter dry between
uses to keep it functioning properly.
A wilted tree that perks up within 24 hours after watering indicates the roots got too dry.
Adjust the watering schedule accordingly. A tree with yellow or cupped leaves or leaves that
don't look perky after watering can indicate excessive watering and soggy roots. In that case,
water less frequently.
Citrus trees prefer less frequent, deep watering to frequent, shallow sprinklings. Creating a
watering basin around the drip line of the tree can aid in deep watering. As the tree grows,
be sure to expand the basin as needed to keep it as wide as the spread of the branches.
Deeper watering promotes deeper root growth and strengthens your tree. Generally, once-aweek watering works well for in-ground or container plantings. Be sure to adjust based on
weather conditions. In general, it is best to water in the morning, but if plants are dry or wilted
it is better to water them immediately, rather than wait until morning.