Is it better to neglect your garden?

Gardens packed with blooming flowers or adorned with neat insect hotels, are extremely popular. But are these highly curated creations actually helpful – or would it be better to allow nature to take its own course?

When she’s not leading garden-based learning at Cornell University’s School of Integrative Plant Science in New York, Ashley Louise Miller Helmholdt is a mum who likes to garden. She has a few different gardens on her property, as well as a patch of lawn for her son to play on where clover occasionally crops up. “I have a little plot that’s just wild,” she says. “I have a native plant and pollinator garden. So I have a little bit of everything.”

Miller Helmholdt doesn’t consider herself a master gardener by any means. Still, she has “a bit of background in this” and knows that a biodiverse, native plant-based garden, even with some so-called “weeds” in it, bolsters the biodiversity in her local ecosystem.

There’s a lot of emphasis today on creating gardens designed to support pollinators. Pollinator populations have been declining precipitously worldwide since the 1990s due to habitat loss, pesticide use, and climate change. The US Western Monarch butterfly population, for example, dropped to just 9,119 individuals in 2024, the second lowest count since records began in 1997. Expanding lawns and a lack of native flowers in urban and suburban areas are doing them a disservice.

Even a small, pollinator-friendly wildlife garden on your property can help revive pollinator populations in your area. “Gardens, backyards, community gardens, school yards, parks, we have this incredible mosaic of green spaces scattered across the country that can help bring habitat back into our neighbourhoods and communities,” says Matthew Shepherd, director of outreach and education for the Xerces Society for Invertebrate Conservation in Portland, Oregon.

But what’s the best way to go about this? As beautiful, pollinator-friendly gardens pop up across the globe, with neat “bee hotels” attached to fences and immaculate patchworks of wildflowers, some experts are questioning whether this is truly what wildlife needs – or if a bit more neglect could be more environmentally supportive in the long run. The leaves of many so-called weeds are food for insects at different life stages, while heaps of messy debris provide vital habitats – should we really clear these things away?

As it happens, creating a wildlife garden doesn’t just mean planting flowers that provide nectar and pollen. A true wildlife haven offers a year-round habitat for local species, and this may translate to letting areas of your green space get a little messy.

“There’s new excitement about supporting the full annual cycle of insects,” says Desirée Narango, a conservation biologist at the Vermont Center for Ecostudies, Vermont. This doesn’t just mean the plants that they need for food, for example, but also where they spend the winter, she says. “We want to support everything that these insects need to have sustainable populations, because then they can be more resilient against the myriad of other things that they have to deal with out there,” she says.

Narango lives in rural Vermont, and her entire backyard is a meadow of native plants that basically takes care of itself. “We have a beautiful, pristine habitat all around us that’s sourcing a lot of really amazing native plants, and so I don’t have to do anything, because they’re dispersing into that area on their own,” she explains. She does have to remove dandelions from time to time to keep the non-native, invasive species from getting a foothold, but she picks her battles.

“There is evidence from North America and Europe that native plants support a greater variety of species than non-native plants,” says Shepherd. Having some non-native plants in the mix can also support pollinators by increasing the nectar supply, as long as they’re kept in check (invasive species have a proclivity for taking over and wiping out less hardy native species).

Narango’s scenario, however, is not what you’ll find in the typically suburban backyard where turf often reigns supreme. If you’re hoping to create a wildlife garden in this environment, you’ll likely need to remove what’s there and start from scratch to give native plants a chance to thrive, says Miller Helmholdt.

“If you’re starting from scratch, you’ll be getting rid of some of those weed seeds in the seed bank that aren’t going to be great.” She recommends tilling the soil a few times to remove weed seeds in the soil so they don’t all germinate and compete with the native species you plant.

Despite their reputation, so-called “weeds” in a garden or lawn serve a purpose in supporting pollinators. A 2016 study found that increasing the amount of white clover in the UK would help significantly with increasing the amount of nectar available to pollinators. Meanwhile, stinging nettles are known to support over 40 species of insects in their native range across Europe, parts of Asia and North Africa. Considering that, it might seem counterintuitive to constantly remove these plants if you’re trying to promote biodiversity. But Narango says there’s a catch.

Outside their native range, Narango explains that so-called weeds such as clover and dandelions mostly just support generalist species of insect – pollinators which aren’t picky about which flowers they visit. “…they’re not really supporting specialist species, vulnerable species, or species of high conservation concern. That’s where you need the native [plant] species,” she says.