The answer to 'when to shrub' is that the best time to prune or trim shrubs is typically in late winter or early spring, before new growth appears. This allows the shrubs to recover and regrow in the spring and summer months. Pruning during the active growing season can stress the plants and lead to uneven or irregular growth.
When pruning shrubs, it's important to remove any dead, damaged, or overgrown branches. This helps maintain the shrub's shape and promotes healthy new growth. Be sure to use sharp, clean pruning tools and make clean cuts just above an outward-facing bud or branch. Avoid over-pruning, as this can weaken the plant.