Tree Watering

TREES NEED WATER.  During winter months when irrigation is off or periods of hot and dry summer months, supplemental water is needed.  There is perhaps nothing more important to a trees health than water.  As a tree grows its watering needs change.  Developing watering plans for young, medium sized and mature trees is very important for a successful landscape.

How much water do trees need?

The amount of water a tree needs depends on many variables and not least of all, the species. For example, a Plains Cottonwood can live on much less water than a White Ash. To find out how much your tree needs, measure (or estimate) its diameter at four feet off the ground, then multiply that number by six. The total is approximately how many gallons of water you should use per watering. A tree with a ten inch diameter at four feet should be given 60 gallons of water per watering. This may seem like a lot of water for larger trees, but keep in mind this only needs to be done once or twice a month. Moreover, using a larger volume ensures sufficient water becomes available to the tree. Spacing the watering applications apart is also important. This allows the soil to properly aerate and gives the tree the oxygen it needs. During hot months (July/August) with little rain, water established trees twice.

If this seams like way too much work just give your trees a good long slow soak a couple times a month they will thank you for it.

Where do I water?

Tree roots spread out farther than the tree is tall. Ideally, you could move the hose around the drip zone while watering, but studies have shown the highest concentration of absorption roots per a volume of soil is near the base of the tree. Turn the water on at a rate that sinks into the soil. At that rate, time how long it takes to fill a one gallon container. This is your calibration for how long to leave the water on. Place the hose at the base of the tree until you reach your desired watering goal.

If you have questions or concerns about a particular tree or site, please call (970) 377-2851 or e-mail us at [email protected]. An arborist will be happy to recommend a proper watering schedule for your trees.

How is the dry winter affecting your trees?

We have been experiencing extremely dry winter along the Front Range. Below average precipitation can lead to a higher stress level in trees and shrubs. When trees run low on stored energy, it opens the door to attack by insects and diseases. Many mature trees, even native to our environment, can be affected. One of the most important factors in keeping a tree healthy and in high vigor is water.