Instead of using a hose or sprinkler try a drip irrigation system.
Slow drip watering trees.
Drip systems emit a slow and steady flow of water allowing for deep penetration of the soil and stronger tree roots.
Make a reservoir over the root ball for watering.
Why water trees and shrubs with drip irrigation watering this way has three major advantages.
Keep moving the hose from place to place until it has dribbled for an hour or even two hours for a large tree.
One option is to turn the hose to a slow dribble and place it on the ground near the trunk.
Treegator bags hold 14 15 gallons of water and release a slow trickle of water over 5 9 hours.
Treegator original is a slow release watering bag that is perfect for newly planted or established trees from a minimum of 1 inch to a maximum of 8 inches in trunk diameter caliper with branches beginning at least 25 inches from the ground or higher.
A single bag fits tree trunks from 1 inch to 3 inches in diameter.
If you provide trees with frequent shallow watering the tree develops shallow.
It may take several hours to properly water a single mature tree.
Treegator bags can also be used to provide a slow delivery of water over the root balls of establishing trees and shrubs.
It provides a slow measured flow of h2o straight to tree and shrub roots.
After half an hour move it a couple of feet around the trunk.