When the sun is shining brightly and temperatures outside warm up we get the urge to start cleaning up our yard and gardens. Here is your permission to leave the clean up until later in the spring. There is good reason for doing this, not just procrastination. While monarchs might migrate south for the winter, the majority of native insects overwinter right here, usually hiding in plain sight.
Butterflies and moths, such as swallowtails, fritillaries, and moths usually overwinter in chrysalids, cleverly blending in with leaves and dead stalks in the garden and wild areas. Fireflies and native bees hide in leaf litter or create burrows underground and stay within an inch or two of the surface. Some bees utilize natural cavities, such as hollow stems from pithy plants and grasses or tunnels into dead wood created by feeding beetles to escape the cold. As gardeners, we can help our winged friends by creating safe habitat for overwintering and resisting the urge to clean out the garden too early in the season. Garden Cleanup
In the spring, wait as long as you can to clean out dead stalks and grasses in the garden, as these may be the home of overwintering invertebrates. Ideally, home gardeners should wait until it is time to mow regularly or the plum trees have stopped blooming, since it is likely that the overwintering bees have already emerged by then to take advantage of the early blossoms. If possible, it is even better to wait until apple trees are blooming, because mining and bumble bees will be first to emerge and enjoy apple blossoms here in Minnesota. In the fall, consider letting your plants stand as they are instead of cutting back and removing dead material. Not only will leaf litter and dried stems provide habitat for insects, but also dead seed heads can be a food source for overwintering and migrating birds.
Mulching
Many invertebrates are unable to dig through the heavy wood chip mulches. Using leaf mold or compost is one alternative; another would be to mulch the first visible feet from the front of your beds, leaving the back of the beds available to nesting bees and insects to make their homes.
Leaves
Our pollinators live and overwinter in the layers of leaves left behind in the fall. It provides shelter from the cold and a great habitat for their food sources as well. Raking, shredding, and blowing leaves may destroy delicate chrysalids, as well as the insects themselves. Consider leaving one area of your yard wild, or letting the leaves lie where they fall for the pollinators. For neighborhoods with a culture of precise garden beds, you might consider downloading one of the free signs from the Xerces Society to help advertise your efforts to save the bees and other pollinators.
Want to learn more? The Xerces Society for Invertebrate Conservation has additional educational resources as well as opportunities to contribute as a citizen scientist in bumble bee watches and monarch mapping.
The Xerces Society for Invertebrate Conservation is an international nonprofit organization that protects the natural world through the conservation of invertebrates and their habitats.
Our name (which is pronounced Zer-sees, or /ˈzɚˌsiz/) comes from the now-extinct Xerces blue butterfly (Glaucopsyche xerces), the first butterfly known to go extinct in North America as a result of human activities. The Xerces blue's habitat was destroyed by development in the sand dunes of San Francisco, and the species was declared extinct by the 1940s.
The Xerces Society is a science-based conservation organization, working with diverse partners that include scientists, land managers, educators, policymakers, farmers, and communities. By utilizing applied research, engaging in advocacy, providing educational resources, addressing policy implications, and building community, we endeavor to make meaningful long-term conservation a reality.
So help the pollinators by waiting to clean up your gardens, they will thank you by pollinating your flowers and vegetables. And provide entertainment watching as they flutter around your garden.
