Dividing perennials is one of the easiest and cheapest ways to get more plants. Many perennials can be divided (https://www.finegardening.com/project-guides/gardening-basics/the-science-behind-plant-division), but how and when should you do it? Andy Brand shows us the steps to follow in this video.
For more information, here are three of the main questions people ask when exploring how to divide perennials: https://www.finegardening.com/project-guides/gardening-basics/dividing-perennials-step-by-step