I'm out her in Arizona and they tell me to water for 90 minutes and I have 4
zones with 2 gallon drips. The 1 gallon drips clog up to much. So I water
all my plants for 30 minutes every third day and the trees are on a 1-10
gallon drip. Now when the winter comes I can tune it to once a week for 30
minutes. If you have good wells for your trees and they don't overflow then
what's wrong with a 30 minute drip?

Richard