As a gardening and landscaping expert, I have had many experiences with pruning yews and can provide you with a detailed answer to your question.
The best time of year to prune yews is in the spring through early summer. This is because yews have a vigorous growth pattern during this time, which allows them to quickly recover from pruning cuts. Additionally, pruning yews in the early spring will ensure that any cuts made are hidden as new growth emerges.
Now, you may be wondering if it is okay to trim yews in the summer. While it is possible to shear yews in late spring or early summer, it is generally not recommended to do heavy pruning during this time. This is because yews have a slower growth rate during the summer months, and heavy pruning can stress the plants and inhibit their ability to recover.
However, if you find that your yews need some light shaping or maintenance during the summer, it is generally safe to do so. Light pruning, such as removing any stray or wayward branches, can be done without causing significant harm to the yews. Just be sure to avoid any major pruning cuts or shearing that may remove a large amount of foliage.
In my personal experience, I have found that yews respond well to pruning in the spring. I usually wait until the last frost has passed and the weather starts to warm up before I begin pruning my yews. This timing allows for new growth to emerge and quickly hide any pruning cuts, resulting in a more aesthetically pleasing appearance.
To summarize, while it is generally best to prune yews in the spring through early summer, light pruning or maintenance can be done during the summer months if necessary. However, it is important to avoid heavy pruning or shearing during this time, as it can stress the plants and impede their recovery. By following these guidelines, you can ensure the health and vitality of your yews while maintaining their desired shape and appearance.
