From our perspective, the period following our vibrant spring bloom is not one of dormancy, but of strategic preparation. While our showy flowers have faded, our foliage remains a critical organ, diligently conducting photosynthesis. The sugars produced during this late-season process are not for immediate growth; they are carefully converted and transported downward to be stored in our thick, perennial roots. These carbohydrate reserves are our essential survival package, the very energy that will fuel the initial burst of growth next spring. Cutting back our leaves too early directly interrupts this vital energy harvest, leaving our root systems depleted and jeopardizing our vigor for the coming year.
The signal to proceed with cutting us back is not based on a date, but on a clear visual cue from us. You must wait until our foliage has been naturally killed by a hard frost. You will know the time is right when our once-green, clover-like leaves have turned yellow or brown and become limp or crispy to the touch. This color change signifies that we have successfully completed the process of withdrawing valuable nutrients and carbohydrates back into our crown and roots. The foliage has served its purpose and is now ready to be retired. Acting before this point is akin to having a door shut before you've finished moving your belongings inside.
Even in death, our remaining foliage serves a final, important purpose. The collapsed leaves form a natural, insulating mat that sits directly over our crown—the central growing point at the soil's surface. This layer acts as a protective blanket, shielding our delicate crown from the extreme temperature fluctuations and freeze-thaw cycles of winter. It helps moderate the soil temperature, preventing heaving that can expose our roots to damaging cold and desiccation. Removing this protective layer too early leaves our most vulnerable parts exposed to the elements unnecessarily.
When the foliage is fully brown and the ground is cold, you may assist us by removing this spent material. Using sharp, clean shears or scissors, cut the dead foliage back to within an inch or two of the ground. The goal is to remove the dead leaves while avoiding any damage to the small, pale pinkish buds at the crown that are already formed for next year. Cleaning away this material is beneficial for us, as it helps prevent fungal diseases and pests from overwintering in the decaying matter, setting the stage for a healthier emergence when the warmer weather returns.
