How to Support Pollinators in Fall

By Hannah Dove

As the hot summer winds cool and leaves turn crimson and tangerine, a peak period of nectar flow begins. Nectar flow refers to a stretch of time when one or more major nectar sources are blooming – in this instance, right before our hardworking bees and butterflies prepare to hibernate or migrate. So how can we support pollinators in fall as they prepare for the winter ahead?

asters support pollinators in fall

Bees will swarm over fall-blooming asters as they prepare for winter.

Plant Pollinator Friendly Flowers

Fall is a good time to plant seeds for bee lawns and native perennial pollinator gardens, which will bloom next year and beyond. Across the Midwest, native flowers such as goldenrods, asters, and sweet clover produce sizable amount of nectar flow to support pollinators in fall. However, that doesn’t mean that you are limited to just these three vital plants. Consult this bee foraging map to determine pollinator-friendly plants in your area for all seasons of nectar flow.

Additional plants that support pollinators in fall in our area include yellow coneflower, silphium, sunflowers, ironweed, culver’s root, bird’s foot trefoil, and fireweed. Overseeding or seeding bare spots in the lawn with flowering ground covers adds ecological value but also consider leaving some bare areas for ground-nesting bees.

landscape with bee lawn on the right

This home owner chose to plant clover in the area near the swing, creating a bee-friendly lawn area.

Create a Habitat for Minnesota’s Native Bees

There are 4,000 bee species native to North America (400 species in Minnesota alone) and most don’t form hives. About 80 percent of bee species nest in the ground; about 5 percent of bee species make themselves at home in the nests of others; and the other 15 percent nest in cavities, using hollow plant stems or holes in wood. Offer nesting sites such as tree snags on your property, bare patches of sandy soil, or by building native bee houses. You can also provide habitat for ground nesting bees by leaving leaves on the ground, having a brush pile, and generally not “putting your gardens to bed.” Leaving ground litter further houses butterfly larvae, preserves soil moisture, suppresses weeds, helps return essential nutrients to the soil, and overall reduces waste in landfills.

sunflower

Sunflowers provide plenty of fall nectar.

Take Action to Help Pollinators

Sign the Pollinator Pledge to help protect essential pollinator habitats, participate in Bumble Bee Watch to contribute directly to the science of pollinator conservation, or sign the Natural Resources Defense Council petition to ban pesticides harmful to bees, such as neonictinoids.

Hannah Dove was the communications intern for MSHS in 2021.

2 Comments

  1. Randall Benson on August 27, 2021 at 3:25 am

    I wish the MHS did more outreach to developers. I am so disappointed with new developments because they mostly plant garbage plants (as far as pollinators and other insects). The new development on Lexington on west 7th for example has day lilies, burning bush, sterile hydrangeas, and turf – what an incredible disappointment when we have rusty patch bees in the neighborhood.

    • Mary Lahr Schier on August 31, 2021 at 2:21 am

      This is a great idea, Randall. I will pass it on to our outreach folks.

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