03/23/2026
https://www.facebook.com/share/p/1DTrq68nPC/?mibextid=wwXIfr
The insects that survived winter in your leaf litter are still there. They haven't emerged yet. And a March cleanup kills them at the last stage.
If you left leaves in your garden beds over winter — whether on purpose or by accident — the moths, butterflies, and firefly larvae that overwintered in those leaves are still developing. Luna moth cocoons are still wrapped in fallen leaves. Queen bumblebees are still in shallow chambers under the leaf mat. Firefly larvae are still in the soil just below the surface.
Most of them are two to four weeks from emerging as adults. They survived five months of winter. They need the leaves to stay in place for a few more weeks.
Raking, blowing, or bagging those leaves now removes their habitat just before the finish line.
The fix costs nothing. It actually requires less work.
🌿 The rule — wait until May:
- Don't remove leaf litter from garden beds, tree bases, or fence lines until daytime temperatures have been consistently above sixty degrees for a week or more — in most of the Northeast and mid-Atlantic that means early May
- By then the vast majority of overwintering pupae have emerged as adults, queen bumblebees have left to start new colonies, and firefly larvae have moved deeper below the disturbance zone
- The difference between a March cleanup and a May cleanup in terms of insect survival is enormous — most of the moths and butterflies that would have emerged from your leaf litter are lost to a March removal
🌿 What to do with the messy six weeks:
- Push leaves to the edges — you don't have to leave them in the middle of your lawn. Rake them under shrubs, along fence lines, and into garden beds. The edges are where most overwintering insects are anyway
- Run a mower over leaves on the lawn at the highest blade setting — shredded leaves fall between grass blades as mulch and decompose in a few weeks while the larger leaf pieces along edges stay undisturbed
- If you need to clean the lawn surface, clean the lawn. Leave garden beds, tree bases, and fence lines alone until May
- If your HOA requires spring cleanup, request a variance for pollinator habitat management in garden beds. The word management changes the framing from neglect to intention
You're being asked to do less work, later. The leaves did their job all winter. Give them one more month 🌿
