Arborvitaes, also known as Thuja, are popular evergreen trees and shrubs that are commonly used in landscaping and gardening. While they are generally hardy and resilient, they can sometimes experience splitting, especially in certain circumstances.
One of the main reasons why arborvitaes split is due to their dense foliage. These evergreens have a dense growth habit, with multiple branches and foliage that can become heavy when wet. During heavy rain or ice storms, the weight of the moisture on the foliage can cause the branches to bend and eventually split.
Another factor that can contribute to splitting is the growth pattern of arborvitaes. These plants tend to have an upright, conical shape, with the top being more slender and delicate compared to the lower branches. This means that the top portion of the tree is more susceptible to splitting, as it is less sturdy and more exposed to the elements.
Additionally, arborvitaes that are planted in areas with strong winds or in locations where they are not protected by surrounding structures or trees are more prone to splitting. The wind puts additional pressure on the branches, making them more susceptible to damage and splitting.
Furthermore, poor maintenance practices can also play a role in arborvitae splitting. Failure to prune the trees regularly can result in excessive growth and imbalance in the branches, leading to weak points that are more likely to split. It is important to regularly trim and shape arborvitaes to maintain their overall health and structural integrity.
In my personal experience as a gardener and landscaper, I have encountered arborvitaes that have split due to a combination of these factors. One particular instance that stands out is when a row of arborvitaes planted along a property line experienced severe splitting during a heavy ice storm. The weight of the ice on the branches caused the trees to splay outward, resulting in significant damage and the need for pruning and support.
To summarize, arborvitaes can split due to their dense foliage, growth pattern, exposure to strong winds, and poor maintenance practices. Understanding these factors can help gardeners and landscapers take appropriate measures to prevent or minimize splitting in arborvitaes. Regular pruning, proper site selection, and protection from harsh weather conditions are essential in maintaining the health and structural integrity of these beautiful evergreens.
