What is the recommended method for dividing perennials?

Dividing perennials is best done in early spring or fall when the plants are dormant. During these times, the plants are not in active growth, which reduces stress on both the plant and the gardener. In early spring, the soil is warming up, and the plants are starting to emerge from dormancy, allowing for easier division as the roots are not yet heavily established in the ground. In the fall, many perennials are preparing to go dormant for the winter, making it a suitable time to divide without disturbing their growth cycle too much. This method also allows the divided plants to establish roots before the harsher winter months.

Dividing in winter when the plants are covered in snow is impractical, as access to the plants is limited and they are not in a state suitable for division. Dividing in summer during peak growth can be detrimental to the health of the plant as it can lead to shock and stress, resulting in poor growth or even death. Dividing throughout the year as needed may lead to inconsistent results as different species have specific times when they respond better to division. Therefore, choosing early spring or fall aligns with best practices for plant health and successful propagation.