How to Water a Tree
One of the most common mistakes we see is that people overwater, says Barton. “It’s not unusual to dig out a dead plant and find a puddle of water in the bottom of the planting hole.” To avoid drowning a new tree, water it based on its size. Set your garden hose to a trickle and place it over the root ball. Let it run ten minutes for every 2 cm of the trunk’s diameter. ( Five centimetres across means 20 minutes.) Or for conifers, he says, give the tree two minutes for every thirty centimetres of height. Begin watering weekly, and then adjust for the soil. Clay soil traps water, requiring less work on your part, while loose and sandy soils drain fast. A simple test to tell if your tree is getting enough water, says Barton, is to stick your finger in the planting hole and wiggle it around. It should be moist, not wet or dry.