I would keep watering it the same amount as before. If it is shady-then the
water will not evaporate as quickly-and you might get fungus and rot. Just
keep doing it the same way the owner told you too-the trees can survive.
Water early nmorning if you can, then it will dry out some during the day.
Much better to water in the am than at night-again-it encourages the
fungus/rot. Good luck.