Live Event: November 5, 11:00am-12:00pm PST - Available on Demand: November 12
The most common cause of death of newly planted urban trees is under- or over-watering. To battle this
problem, there are many guidelines written to prescribe how much water to give. However, a few questions are
not addressed by prescribing a certain amount of water applied to a newly planted tree.
1. How much water evaporates?
2. How much water runs off?
3. How much water drains to subsurface?
4. How much water consumed by weeds instead of the tree?
Without answers to these questions, the amount of water applied means nothing. Soil moisture, the water that becomes available to most tree species, should be the indicator for watering a tree or not. But it is harder to do than simply dumping a certain amount of water onto the rootball.