Protect butterflies & moths
Some species spend winter as eggs, caterpillars, or cocoons hidden among leaves.
That blanket of autumn leaves isn't a mess. It's winter shelter for pollinators, food for soil life, and a gift to your garden.
How to do it right ↓Explore the evidenceFallen leaves do important work long after the trees let them go. Here are six reasons to keep some where nature can use them.
Some species spend winter as eggs, caterpillars, or cocoons hidden among leaves.
Leaf cover insulates soil where some overwintering bees and other insects shelter.
Decomposing leaves return organic matter and nutrients to the ground.
Leaf litter hosts invertebrates that become food for birds and other wildlife.
Leaves used as mulch in beds help limit evaporation and moderate soil temperatures.
Predatory beetles and other helpful insects can use sheltered areas to overwinter.
You don't have to choose between a healthy lawn and a wildlife-friendly yard. The secret is where—and how many—leaves you leave.
FACT: A light scattering is generally fine. Thick, wet, matted layers can block light and smother turf, so move excess whole leaves into garden beds.
FACT: They're natural mulch, organic matter, and habitat for creatures that keep a yard ecosystem functioning.
FACT: Keep walkways and active lawn areas tidy. Designate leafy beds, tree rings, and wildlife corners.
FACT: Mulching leaves can help turf, but intact leaves provide better shelter for overwintering insects. Relocate whole leaves where possible.
Grass should still be visible. Don't leave heavy, wet mats that cover the lawn.
Gently rake excess leaves into flower beds, under shrubs, or around trees—keeping them away from trunks.
Leave protected leaf areas undisturbed through winter and into late spring to give wildlife time to emerge.
Use judgment around drainage, slippery paths, local rules, and visibly diseased plant material. A wildlife-friendly yard can still be cared for.
Explore conservation guidance, research-informed fact sheets, and discussions of field research. These links distinguish practical recommendations from original experimental studies.
Evidence note: these are credible research-informed resources, including a technical fact sheet and a research interview; they are not all peer-reviewed experimental papers. Leaf cover is beneficial habitat, but dense mats can harm turfgrass.