Question
How often do you water and how, (old 20-30 yr) Italian Cypress trees.

Answer
About once a week if it has not rained recently (dry conditions/drought)and then only about 1 unch of water each week. Place a pan under the tree and water and when the pan has 1 inch of water in it stop. Otherwise the tree is doing fine getting water if it is 20-30 years old so let it continue.