How can I effectively divide hostas to promote healthy growth and propagation in my garden?

To effectively divide hostas for healthy growth and propagation in your garden, dig up the hosta clump in early spring or fall, ensuring each division has roots and shoots. Use a sharp knife to separate the clump into smaller sections, making sure each division has at least 3-5 shoots. Replant the divisions in well-draining soil with adequate sunlight and water regularly to promote healthy growth.