Yes and no. Yes, you may prune shrubs in the winter if that's when they have their regular pruning schedule. In this regard, the pruning tends to be done in February.
But pruning may be done any time the rule of the letter 'd' applies. That means that it can be done if there's damage, danger or disease.
Yes, shrubs can be trimmed in winter. Damaged, dangerous, dead, decayed, diseased, dormant and dying woody plant parts demand careful pruning -- away from community traffic and electrical hazards, in personal protective equipment and with clean tools -- into dry wood on a dry day at any time during the year. Otherwise, the rule tends to be to favor fruit, random-branched coniferous and summer-flowering shrubs for the dormant months.
most spring blooming shrubs require pruning after the blooms are gone, but before fall.
It is recommended to trim bridal wreath shrubs after they have finished blooming in the spring. This allows you to shape the shrub and encourage new growth without cutting off potential flower buds for next year. Avoid trimming the shrub in the fall or winter to prevent removing the buds that will bloom in the spring.
There are a few ways to trim round shrubs. If you want a formal look, use an electric trimmer. This will create straight edges. If you want your shrubs to look more textured, you should use clippers to open up space into the plant.
Trees and shrubs can be lightly pruned anytime in Florida. To minimize reduction of next year's flowers, prune spring-flowering plants such as azaleas, in late spring before the flower buds set for the next season.
Trim in in the spring before the leaves come out.
Early spring. You can trim up to 1/3 of the stalks, and trim from the ground up.
This is a very comprehensive answer from NC State University: http://www.ces.ncsu.edu/depts/hort/consumer/factsheets/shrubs/text/pruning.html
It is generally best to prune non-flowering bushes or shrubs during late winter or early spring before new growth begins. This allows the plant to recover and grow vigorously during the upcoming growing season. Avoid pruning too late in the season as it can affect next year's flowering.
Generally, it's towards the end of winter that you trim, prune or otherwise cut shrubs in Pennsylvania. But that decision depends upon two conditions. One condition is the particular pruning schedule of a particular shrub. For example, early spring blooming shrubs generally need their care delayed until after the bloom.Another condition is the reason behind the care. Care may be done any time that the reason may be said to begin with the letter 'D'. Specifically, that means if the shrub is damaged, dangerous, dead, diseased or dying.
If you must trim it do it in the Spring.
Early spring. You can trim up to 1/3 of the stalks, and trim from the ground up.
Yes, Once the shrubs reach the desired height you trim them to maintain there shape and size. Remember that you are dealing with a slow growing shrub and if you get to aggresive with the trimming it will take some time for the shrub to heal if it can at all. I would trim them twice per year spring and fall and remove no more than 1"- 2" at a time.