Tree pruning in the Portland, OR, area will depend primarily on the special circumstances of the tree in question. While there are some general rules regarding the different pruning types, the timing of pruning and the frequency of pruning, in an urban environment that is so rich with trees, the work performed needs to be adjusted to the situation and goals of each tree owner, within reason.
The following are general guidelines for the most common frequencies, timing and types of pruning for the majority of the trees you will find in the greater Portland metro area. If you ever have questions about your particular tree, feel free to call us at 503-226-7143 to schedule an appointment.
Frequency of Pruning
Most deciduous trees in an urban environment such as Portland will benefit from pruning every 3-5 years. This frequency may need to be increased if the trees are close to or over structures.
Pruning a tree more heavily less frequently in order to avoid regular pruning often creates the opposite of the desired effect. The tree sends out significant new growth in response to the heavy pruning, resulting in more frequent follow-ups. There is a delicate balance of taking just the right amount that must be maintained, something the arborists at Urban Forest Pro are well-versed in.
Most of the large fir and pine trees in the Portland area need to be pruned every 5-7 years. It is important, however, to inspect trees for changes that may affect their health and therefore their pruning schedule during this time. When in doubt, ask an arborist.
Cedars and other evergreens should be pruned every 3-5 years in most cases. This frequency may need to be increased if the trees are close to or over structures, which many trees in the area are. Again, when in doubt, it is always better to get the opinion of a professional than damage one of our area’s greatest resources.
Most ornamental trees can be pruned at the specific tastes of the owner. Most commonly, these types of trees are pruned yearly or every other year. Some however, are pruned as much as twice a year to achieve the desired look. It depends on the preferences of the owner and the situation more than anything.
Timing of Pruning
The timing of pruning your trees is very dependent of the type and condition of the tree. If your tree has not been regularly maintained, the best time to prune is now. If you have kept to a regular tree pruning schedule then the best timing for pruning will depend on the type of tree and your convenience.
Types of Pruning
Bring out the best in your trees and shrubs by showcasing what nature already did. The form of the tree is strengthened, accented, and cleared by removing what does not fit.
Dead, diseased, rubbing, and duplicated limbs are eliminated. Additionally, we remove at most 10-20 percent of the tree crown. The greatest compliment we receive is when the owner says, “It doesn’t look pruned, it just looks better!”
Better aesthetics will lead to better health for your tree. Opening things up and removing the excess and dead limbs allow more air to circulate through the remaining limbs and branches. This increased air circulation can improve a wide range of tree health issues, from insect colonies to fungal growth, all without the need for chemical intervention.
On occasion, a tree can grow too large for its setting or too old to support some of the furthest growth from the root system. In these cases, we will sometimes suggest tree removal and replanting. However, there is a pruning remedy. Crown reduction pruning is a way of cutting back tips and leaving certain leaders to create a new, lower crown.
This time-honored professional practice should not be confused with topping, which we do not perform. Topping is the indiscriminate lowering or shaping of a tree to arbitrary points between nodes or branches. Because topping makes a tree more susceptible to disease and other problems, it is never recommended by Urban Forest Pro, unless there is a specific need.
If a tree has been topped, we can begin the process of restoration with the first pruning. We reduce the amount of leaders struggling for light, and separate these as evenly as possible. If done properly, after a pruning cycle lasting several years, a tree that has been “ruined” can often be reclaimed, and go on for years and years after the event.
Ever notice how deadwood seems to gather at the bottom of pine and fir trees? Growth is mainly a function of available light. Light, for a tree, is food, and leaves are the tree’s stomach. When a tall, straight tree gains more growth on top, it is natural that it will lose limbs on the bottom.
We anticipate this action by pruning the lowest limbs on many of our native conifers and some of our large native deciduous trees, like big leaf maples. It keeps them healthy and encourages upward growth.
When a tree is planted for fruit, flowers, or to conform to a space that is too small for the norm in nature, it can be pruned formally to keep a desired shape. If the pruning is done regularly and properly, it can be a thing of beauty and usefulness. Unfortunately, we find many trees that have started out formally, but been let go. If it’s feasible, we save the tree. That is always our first goal. However, if it is not possible, we will recommend removal and replanting.
Our whole purpose is to work with homeowners and businesses to preserve the natural beauty of our tress here in the greater Portland, OR. Tree pruning is a vital part of that process and in many cases can be utilized to save a tree that seems too far gone. If you have any questions about pruning your trees, feel free to call us at 503-226-7143 and arrange a meeting with one of our certified Portland arborists. We would be happy to examine your unique situation and explore all your options with you.