I live in a climate with a 6 month dry season. Established trees are fine with only rain, but new trees need 10-15 gallons a week of watering when its dry. Las

I live in a climate with a 6 month dry season. Established trees are fine with only rain, but new trees need 10-15 gallons a week of watering when its dry. Las Vegas only gets 4 inches of rain a year, so I imagine supplemental water is likely needed nearly every week for several years.