In a unanimous 13-0 vote on July 18, 2024, Appleton, Wisconsin's city council removed 'No Mow May' from its municipal code, reinstating grass height restrictions. This decision, reported by The Post-Crescent, followed the formal retraction of a key study in Appleton that had initially supported the initiative, as reported by Undark. Appleton, once central to the 'No Mow May' movement, now leads a growing debate on effective ecosystem support.
'No Mow May' was widely adopted as a simple way to help pollinators. However, scientific evidence increasingly suggests a more consistent, less frequent mowing schedule is more beneficial. The initial appeal of letting lawns grow wild for a month, aiming for early season bee forage, quickly captured public interest, but municipalities now demand environmental policies grounded in robust science, not broad, temporary campaigns.
Communities and homeowners will likely transition from strict 'No Mow May' to more flexible, evidence-based 'low-mow' or 'slow-mow' programs. These offer sustained pollinator support, making understanding their true benefits critical for local biodiversity in 2026.
The Promise and the Pivot
Households observing 'No Mow May' had three times more bee species and five times higher bee abundance than regularly mowed spaces, according to a retracted 2020 study cited in various blogs. The finding that households observing 'No Mow May' had three times more bee species and five times higher bee abundance than regularly mowed spaces fueled widespread adoption, suggesting a simple monthly pause could boost pollinator populations. The research's retraction now forces communities to reconsider.
Ferndale, Michigan, for instance, is not participating in 'No Mow May' this year, according to CBS News. Instead, residents are asked to partake in 'more permanent, long-term pollinator-aware lawn care.' The request for residents to partake in 'more permanent, long-term pollinator-aware lawn care' shifts focus from seasonal campaigns to continuous, integrated approaches for local wildlife.
'No Mow May' captured public imagination with its simple call to action. However, retracted research and municipal shifts now demand robust, long-term pollinator strategies. Communities understand that effective environmental stewardship requires sustained effort, not a single annual pause.
The Scientific Nuance of Low-Mow
Lawns mowed every three weeks had 2.5 times more lawn flowers than other lawns in a Springfield, Massachusetts study, detailed in various blogs. The finding that lawns mowed every three weeks had 2.5 times more lawn flowers than other lawns challenges the idea that stopping mowing completely is best for floral diversity. Further research showed unmowed Kentucky bluegrass plots did not support substantially more flowers than plots mowed at two-and-a-half inches over one month, according to Undark. A moderate, consistent mowing schedule proves more effective for fostering floral growth.
Meta-analyses also found a significant increase in butterfly and bee abundance and species richness in less-frequently mowed lawns, according to Bee City USA. The broad scientific consensus from meta-analyses, which found a significant increase in butterfly and bee abundance and species richness in less-frequently mowed lawns, confirms reduced mowing is beneficial, but specific frequencies, not absolute neglect, optimize pollinator habitats.
These studies collectively prove consistent, moderate mowing throughout the growing season fosters a more diverse and abundant pollinator habitat than a temporary cessation. Evidence shows strategic maintenance yields better outcomes in lawn ecology.
Optimizing Mowing for Pollinators
Researchers in Massachusetts observed 93 species of bees visiting lawn flowers, with the greatest diversity and abundance on lawns mowed every two or three weeks, as reported by Bee City USA. The research observing 93 species of bees visiting lawn flowers, with the greatest diversity and abundance on lawns mowed every two or three weeks, confirms a consistent, less frequent mowing schedule is more effective for supporting a wide range of pollinator species. A blanket 'no mow' approach is suboptimal, potentially less effective than moderate, consistent mowing for long-term biodiversity.
A Springfield, Massachusetts study noted lawns mowed every two weeks had the highest bee abundance, while lawns mowed every three weeks showed potentially higher bee species richness and 2.5 times more lawn flowers, according to blogs. The tension in findings, where lawns mowed every two weeks had the highest bee abundance while lawns mowed every three weeks showed potentially higher bee species richness and 2.5 times more lawn flowers, means optimal mowing frequency depends on specific ecological goals. Maximizing total bee numbers might favor a two-week cycle, but fostering wider bee species and floral diversity may benefit from a three-week cycle.
Actionable Steps for Your Lawn
To maximize pollinator benefits, homeowners should aim for a 'low-mow' approach, mowing every two to three weeks, and consider local regulations. Research from Massachusetts, identifying 93 bee species, confirms lawns maintained at these frequencies support the greatest diversity and abundance of pollinators, according to Bee City USA. Consistent maintenance, as confirmed by research from Massachusetts identifying 93 bee species on lawns maintained at these frequencies, provides a steady supply of nectar and pollen throughout the growing season.
Appleton's reinstated height restrictions are 8 inches on developed lots and 12 inches on undeveloped lots year-round, as reported by The Post-Crescent. These local ordinances offer a framework for property owners to manage lawns, supporting pollinators while adhering to community standards. Homeowners can integrate these into low-mow strategies.
What are the benefits of consistent low-mow practices?
Consistent low-mow practices, such as mowing every two to three weeks, demonstrably increase both the abundance and species richness of bees and other pollinators. These methods ensure a steady supply of diverse lawn flowers throughout the growing season, providing continuous forage for insects. The approach of consistent low-mow practices helps maintain a balanced ecosystem in residential areas, supporting more types of bees over a longer period.
When does No Mow May typically occur?
No Mow May is an initiative that typically encourages homeowners and communities to refrain from mowing their lawns for the entire month of May. This temporary pause in mowing is intended to allow early spring flowers to bloom, providing crucial food sources for emerging pollinators. The campaign generally starts on May 1st and concludes on May 31st each year.
What is a 'Low Mow Spring' strategy?
A 'Low Mow Spring' or 'Slow Mow Summer' strategy involves consistently mowing lawns less frequently, for example, every two to three weeks, rather than completely stopping for a single month. This approach aims to support pollinators throughout the entire growing season by allowing a continuous cycle of flowering plants to emerge. Unlike 'No Mow May,' it integrates reduced mowing as a long-term practice, often accompanied by specific height restrictions or guidelines.
If other communities follow Appleton's lead, municipalities clinging to 'No Mow May' may soon find that their environmental policies based on retracted science, likely shifting to evidence-based 'low-mow' programs by Q3 2026 for more effective pollinator support.
