If you have seen the tell-tale signs of perennial plants starting to lose their vigor, you want to take action. An ideal way to do this is to divide plants, and February offers an opportunity to do so in warm and milder zones.
Division in late winter or early spring is suitable for a wide range of summer-flowering perennials and perennial herbs. If the soil is workable, not frozen or waterlogged, and your plants are just starting to stir from dormancy, the window to divide plants is open. In warm or milder US hardiness zones, this can be the case in February, but gardeners in colder climates are better holding off until at least next month.
