When it comes to cutting back perennials in the winter, it is important to know which ones are hardy enough to withstand the cold temperatures. Some perennials are more delicate and may not survive if pruned too aggressively. In this case, it is best to avoid cutting back marginally hardy perennials like garden mums, anise hyssop, red-hot poker, and Montauk daisy.
Garden mums, also known as Chrysanthemum spp., are popular fall-blooming perennials. While they may die back to the ground in colder regions, leaving the stems intact can provide some extra insulation for the roots during the winter months. Cutting them back too early can expose the roots to freezing temperatures and potentially harm the plant’s chances of survival.
Anise hyssop, or Agastache foeniculum, is a beautiful perennial known for its fragrant leaves and spikes of purple flowers. It is relatively hardy, but cutting it back too much in the winter can weaken the plant and make it more susceptible to frost damage. Leaving the stems intact can help protect the crown of the plant and ensure its survival.
Red-hot poker, or Kniphofia uvaria, is a striking perennial with tall spikes of red, orange, and yellow flowers. It is native to South Africa and may not be as cold-tolerant as some other perennials. Cutting back the foliage in the winter can expose the crown of the plant to freezing temperatures, potentially causing damage. It is best to leave the foliage intact to provide some protection.
Montauk daisy, or Nipponanthemum nipponicum, is a lovely late-season bloomer with white daisy-like flowers. It is native to Japan and is often grown for its ability to withstand cooler temperatures. However, cutting it back too much in the winter can weaken the plant and make it more susceptible to winter damage. Leaving the stems intact can help protect the plant and ensure its survival.
In my personal experience, I have made the mistake of cutting back marginally hardy perennials too much in the winter, only to see them struggle or even die in the following spring. Learning from these experiences, I now take a more cautious approach and avoid cutting back perennials like garden mums, anise hyssop, red-hot poker, and Montauk daisy too aggressively.
To summarize, it is best to avoid cutting back marginally hardy perennials in the winter. Perennials like garden mums, anise hyssop, red-hot poker, and Montauk daisy benefit from leaving the stems intact to provide protection and insulation during the cold months. By being mindful of their hardiness and avoiding excessive pruning, you can ensure the survival and health of these beautiful plants.
