City of Toronto — Help Wild Bees & Other Native Pollinators
Ontario-specific fall guidance: keep leaves, hollow stems and small branches as overwintering habitat.
Read the original source ↗Show me the science
Real sources. Good reading.
A transparent collection of open-access educational resources that inform this website. Explore the original guidance for more depth and context.
Evidence & further reading
Our source library.
These resources are freely available to read online. “Open-access” here means publicly readable, not unrestricted permission to reuse their text or images. This website uses original writing and artwork.
City of Toronto — Sustainable Landscaping
Practical spring cleanup advice and protection of Toronto pollinators.
Read the original source ↗Xerces Society — Leave the Leaves
Evidence-based habitat guidance for overwintering invertebrates, plus low-impact cleanup.
Read the original source ↗Xerces Society — Leave the Leaves! (2026)
Tips about intact leaves, stems, brush and wildlife-friendly fall gardening.
Read the original source ↗Xerces Society — Natural Pest Control
How predatory insects use leaf litter and other habitat year-round.
Read the original source ↗National Wildlife Federation — Leave the Leaves
An overview of leaf habitat, wildlife, and thoughtful garden practices.
Read the original source ↗National Wildlife Federation — Five Benefits of Fallen Leaves
Practical wildlife, soil and gardening benefits of leaf retention.
Read the original source ↗National Wildlife Federation — Leave the Leaves to Attract Birds
Describes how birds forage for seeds, insects and other food in leaf litter.
Read the original source ↗National Wildlife Federation — Firefly-Friendly Gardening
Firefly larvae, leaf-litter moisture and the importance of limiting outdoor lights and pesticides.
Read the original source ↗University of Minnesota Extension — Fall Leaf Mulching
Benefits of finely mulched leaves for turf, alongside cautions about excessively thick leaf cover.
Read the original source ↗National Wildlife Federation — Seven Species That Need Leaves
Wildlife profiles illustrating the food and shelter benefits of fallen leaves.
Read the original source ↗City of Toronto — PollinateTO Best Practices (PDF)
Checklist-style practical guidance for protecting nesting pollinators.
Read the original source ↗Some important caveats
Different gardens, species and climates call for different decisions. Leaf cover can benefit wildlife, but overly thick mats can damage turf; diseased leaves and fire-prone conditions require special handling; and spring-emergence times vary. Use municipal guidance and local conditions alongside the general information here.