Where Memory Takes Root: Gardening, Dementia, and the People Who Care

November is National Alzheimer’s Disease Awareness Month, and this year the connection between gardening and dementia feels personal.

My daddy is living with dementia. Some days he is fully himself: quick with a story, sure of the names of things. Other days the path is harder to find, for him and for those of us walking beside him. Our family is learning what so many families learn: this journey asks for patience and creativity, and it asks for a lot of love.

I spend my days believing in what happens when people put their hands in the soil. So, this month I went looking for new research on gardening and the brain. I also wanted to know what a garden can offer a family living with dementia. Here’s what I found, and what I’m holding onto.

Alzheimer’s and dementia aren’t the same thing

Alzheimer’s is the most common cause of dementia, but dementia can have other causes, too. Dementia is the broader term for changes in memory, thinking and everyday functioning. Alzheimer’s disease is one condition that can cause it.

That distinction matters. Different causes can follow different paths and call for different kinds of care, so it’s worth understanding what your loved one is facing.

Just as important is remembering that behind every diagnosis is a person, and a family finding its way. My dad is not a diagnosis. He’s a man who has been my hero and the rock for hundreds of people around the world. He led a global sales team for an oil field equipment company, then became a priest. He is funny, handsome, faithful, and loves his grandchildren and great grandchildren beyond measure. Any conversation about dementia should start there.

What the research says about gardening and the brain

The evidence is encouraging, with one honest caveat: most studies show gardening is linked to better brain health. They don’t prove it prevents dementia.

• Lower dementia risk. A large UK Biobank study published in Neurology found that people who frequently did household and garden tasks were 21% less likely to develop dementia. Those tasks included watering, mowing, digging and weeding. The link held even after accounting for genetic risk and family history.
• Sharper thinking into old age. University of Edinburgh researchers followed a group of Scots across nearly a century. Those who gardened had better thinking and memory skills. The researchers noted that planning a garden and remembering plant care draw on memory and executive function.
• Fewer memory complaints. A study of nearly 137,000 adults age 45 and older found that people who gardened or did yard work reported fewer memory problems.
• A biological signal. In a small Korean study, 20 minutes of vegetable gardening raised levels of BDNF and PDGF in adults over 65. Both are growth factors tied to brain health.

Why might it help? Gardening bundles several good things into one routine: movement, problem-solving, time outdoors, lower stress and a reason to get up in the morning. Neurologists are careful to call it one meaningful piece of the puzzle, not a stand-alone solution. I think that’s exactly right.

When dementia is already part of the story

For families like mine, the most hopeful research is about people already living with dementia.

A 2024 review pooled 9 randomized controlled trials involving 655 older adults with dementia. Horticultural therapy improved cognitive function, depression, daily activities and quality of life compared with usual care. Outdoor programs worked better than indoor ones. Thinking improved most when sessions happened at least twice a week. The authors noted that more high-quality studies are still needed.

An earlier review found that gardening eased agitation. It also increased the time people spent engaged in activities and cut the time they spent doing nothing.

This makes sense to me. A garden asks for simple, familiar actions: touching soil, smelling basil, watering, picking a ripe tomato. Those actions can reach a person even when words are hard to find. Planting something and watching it grow brings a sense of purpose. So does being needed by a living thing. That can matter a great deal to someone whose world is getting smaller.

You don’t need acres. A raised bed, a few containers on the porch or a pot of herbs on the windowsill is enough to start.

Care for the person doing the caring

Caregiving carries its own weight: the appointments, the decisions, the uncertainty, and the love woven through all of it.

A few quiet minutes beside something growing can be a small space for the caregiver, too. It’s a place to take a breath without needing to solve the next problem immediately.

The research backs this up. In one study of an outdoor gardening program for people with dementia, caregivers reported less distress afterward than caregivers whose loved ones stayed with usual indoor activities. When the person we love is calmer and more engaged, we breathe a little easier too.

So, if you’re caring for someone right now, this is your permission slip. Step outside. Pull a weed. Water something. Sit beside it for five minutes and let it be enough. You can garden with your loved one, and you can also garden for yourself. Both count.

Plant something together

If someone you love is living with dementia, I hope you’ll think about gardening together. A desktop garden, an amaryllis bulb in your favorite planter, a small container of seasonal herbs. Start small. Choose plants that engage the senses, like herbs to rub and smell, bright flowers or an amaryllis you can watch grow and bloom. Let the moment matter more than the result.

And if you’re the one doing the caring, save a few of those minutes for yourself.