Gardening is linked to a longer life. Here’s how it helps your body.

Doctors usually prescribe medication or medical treatment. But increasingly, they’re also recommending activities such as gardening to support mental and physical health.

The practice, known as social prescribing, has gained traction around the world. In 2020, the United Kingdom government invested $7.7 million in green social prescribing projects aimed at tackling mental health issues. In the United States, horticultural therapy is offered to veterans suffering from PTSD, while therapy gardens in Scandinavia provide sensory stimulation for people with neurological conditions.

Comedian and longtime gardener Zach Galifianakis summed up the appeal on his recent Netflix series, This Is a Gardening Show: “If I was to offer a remedy to the human condition, it would be a garden.”

He may have been joking, but there’s some truth to his statement. Decades of scientific research show that growing plants is good for the body and brain—and could even help you live longer. Here’s what scientists are learning about why tending plants can be so good for you.

Movement as medicine

Gardening has been linked to better physical health, in part because it keeps the body moving. “It involves sustained low-grade effort of movement, whether it's planting, pruning, lifting bags of soil, digging, or moving wheelbarrows,” says Hugh Coyne, physician and co-founder of Coyne Medical. “Getting your heart rate up can have a positive effect on your cardiovascular health, but also the effect of working with your hands and doing repetitive tasks...can reduce cortisol.”

Spending time in nature can also help activate the parasympathetic nervous system, the body’s “rest and digest” mode, says neuroscientist Marion Oberhuber, founder of the Plant Wisdom Project. “We receive sensory stimulation and the vagus nerve transmits the signal that we are safe, bringing down cortisol.” Gardening is particularly powerful because it provides multisensory stimulation: seeing plants and wildlife, hearing birdsong, touching leaves and soil, and breathing in natural scents.

(Why does time spent in nature relieve stress?)

That calming effect may also support sleep. A 2025 trial found that older adults who participated in horticultural therapy reported improved sleep quality. Researchers suggested that reduced stress may have played a role. “If you're getting poor sleep because of elevated or chronic cortisol activation, your body isn't able to repair itself as much as it should,” says neuroscience researcher Mia Soviero.

Gardening may benefit health in other ways, too. People who garden tend to eat more fruits and vegetables, and emerging research suggests that handling plants and soil indoors may expose the body to microorganisms that help regulate immune and inflammatory responses. “These tiny organisms create a reduction in inflammatory responses in the body and promote the helpful aspects of the immune system,” Coyne says.

Why gardening is good for the brain

You don’t need to push heavy wheelbarrows or dig up enormous pumpkins to benefit from gardening. Even lighter activities, such as planting seeds, watering, and pruning, may support cognitive and mental health. A 2024 study of older adults in China showed that frequent garden work was associated with a reduced risk of developing dementia.

Another small pilot study from the same year found that horticultural therapy reduced depression symptoms among people already living with dementia. “A fascinating downstream effect is that if we lower cortisol, we find increased brain growth factors, which means that your neurons are being put in a better place to form new connections, ” Oberhuber says.

(Here’s how to relieve stress at the world’s beautiful Zen gardens.)

Gardening has also been associated with better mood. A 2021 study found that gardening two or three times a week reduced stress and increased positive emotions, and a 2024 review of 40 studies measuring outcomes including depression and anxiety found an overall significant positive effect. “Nurturing a plant or seeing it come into bloom gives people a sense of accomplishment and purpose. Those things are really important in protecting it against depression and anxiety,” says Coyne.

Oberhuber adds soil microbes may play a role in mood, too. In one small pilot study, people had higher serotonin levels in their blood after handling soil containing a particular bacterium. That doesn’t mean ordinary garden soil has the same effect—or that it changes serotonin in the brain—but it offers one clue about how contact with soil might influence the body.

Gardening can also deliver small, satisfying rewards: a seed sprouts, a flower opens, or a struggling plant begins to recover. Those moments can tap into the brain’s reward system. Your brain gets dopamine–which is a feel-good chemical–as a reward for doing something or solving a problem, as often is the case with gardening.”

Can gardening help you live longer?

Gardening has increasingly been linked to healthier aging—and possibly a longer life. A 2024 survey of 13,812 adults in the U.S. found that outdoor gardening was significantly associated with a lower mortality risk. A 2026 longitudinal study similarly showed that frequent gardening was linked with a 22 percent lower mortality risk and longer telomeres, the protective structures at the ends of chromosomes that tend to shorten with age. “Telomere length is essentially [one] measure of your biological age,” Soviero explains.

(The key to better mindfulness may be your public garden.)

“Reduced mortality is probably a combination of several things, like reducing cortisol over a longer period of time, a more physically healthy lifestyle, and potentially the social aspects as well,” Oberhuber says.

Coyne agrees that strong social ties have consistently been associated with better health and longevity. “It's also about having people around you who can spot signs of disease or spot someone who is declining physically and needs more support.” Whether solo or with others, a bit of plant parenthood could be a highly effective prescription for a longer, healthier life.