The answer to 'frequency of shrub' is that the recommended frequency for pruning and maintaining shrubs varies depending on the type of shrub and its growth habits. As a general guideline, most shrubs should be pruned annually or every other year to maintain their shape, promote healthy growth, and prevent overgrowth. However, some fast-growing or large shrubs may need pruning more frequently, while slower-growing or smaller shrubs may only require pruning every few years.
It's important to pay attention to the specific needs of your shrubs, as the ideal pruning frequency can also be influenced by factors like the climate, soil conditions, and the shrub's overall health and vigor. If you're unsure about the best pruning schedule for your shrubs, it's always a good idea to consult with a local landscaping professional or horticulturist who can provide personalized guidance based on your specific plants and growing conditions.