Instead, the two optimum times of year for propagation by division are autumn (considered best for most spring or early summer flowering perennials), and spring (considered best for most late summer and autumn-flowering perennials). I use the word “best” here intentionally, because the truth is that the vast majority of perennial plants can be successfully divided in both these seasons. [ How can I start growing my own plants from seed this spring?Opens in new window ]Closely inspect it for any weeds, which should be carefully removed. The roots of lady’s mantle (Alchemilla mollis), for example, are shallow, fibrous, and relatively easy to lift and divide. It’s important to temporarily fence these reseeded areas off from use to allow the new grass plants to properly establish.

Source: The Irish Times March 21, 2026 15:30 UTC