Australia’s aged care sector is at a crossroads. The demand for high-quality residential care is growing faster than ever and the evidence is now overwhelming that one of the most powerful tools for supporting elderly wellbeing isn’t a new medication or technology. It’s nature itself.
Decades of research confirm that access to green spaces leads to richer, happier and longer lives for older Australians. As the sector works to meet a surge in demand, the case for embedding nature into residential aged care has never been stronger.
Australia’s Ageing Population: A Growing Imperative
The scale of Australia’s ageing demographic shift is hard to overstate. According to the Australian Government’s 2025 Population Statement, the number of Australians aged 85 and over will jump 67% within a decade — surpassing one million people — and is projected to nearly triple to almost two million by 2065–66. At the same time, the 2024 Population Statement confirms there are already more than 2.1 million Australians aged 75 and over, a number set to surpass 3.2 million by 2034.
This rapid growth places enormous pressure on residential aged care providers to think beyond the clinical and consider the full spectrum of what makes a good life in older age.
As acclaimed Dr William Bird MBE writes in his influential paper Natural Thinking:
“The main aim of health care for the elderly is to add life to years rather than years to life, so that the elderly have increased quality of life with more independence and the ability to remain as a part of their own community.”
The growing body of evidence on green spaces suggests that nature may be one of the most effective and cost-efficient ways to do exactly that.
The Science: How Green Spaces Improve Health and Longevity in Older Adults
The link between green space and healthy ageing has moved well beyond anecdote. A comprehensive 2025 systematic review and meta-analysis covering studies up to November 2024 found that green space exposure was associated with meaningful reductions in Alzheimer’s disease risk (OR = 0.856) and depression (OR = 0.724) in older adults. The same review found associations with improved outcomes across circulatory health, metabolic disorders, cognitive decline, and overall life satisfaction.
A landmark 2023 study by researchers at Northwestern University tracked more than 900 participants over two decades, measuring their biological age through DNA methylation — an accurate cellular marker of ageing. The findings were striking: long-term exposure to green spaces was associated with being biologically up to 2.5 years younger than one’s calendar age. The research suggests that greenery may slow ageing at the cellular level itself.
Broader meta-analyses show that a 10% increase in residential green space correlates with meaningfully lower risk of depression among older adults, while systematic reviews confirm associations between green space exposure and lower cortisol levels, reduced blood pressure, and decreased all-cause mortality.
Green Spaces and Dementia: A Protective Effect
One of the most significant findings in this space relates to dementia — a condition affecting a growing proportion of Australians in residential care.
A French study of over 2,000 people found that regular gardening roughly halves the risk of developing dementia. A 2025 meta-analysis confirmed that green space exposure is associated with a statistically significant lower risk of Alzheimer’s disease. And a 2024 scoping review in Frontiers in Public Health found evidence suggestive of a protective role of green space on cognitive function, with researchers noting that poorer urban environments, which often lack parks and green spaces, pose the greatest risk to older people’s mental health.
As Dr Bird writes: “Older people can benefit from gardening due to increased physical and mental activity, a sense of purpose and meeting friends. This contact with nature significantly improves concentration, and with patients with dementia it can introduce positive experience, improve their sense of coherence, and reduce aggression and agitation.”
A Swedish study reinforced this, finding elderly participants showed significantly greater improvements in concentration after spending one hour resting in a garden compared to remaining indoors — a finding with clear implications for dementia care environments.
Mental Health, Loneliness and Social Connection
Even before the COVID-19 pandemic, loneliness was a daily experience for nearly 20% of older Australians, particularly those over 75. Post-pandemic, that figure has only worsened.
Green spaces offer a powerful antidote. Retirement homes with higher concentrations of green spaces have been shown to foster social cohesion and reduce feelings of isolation. A 2024 study published in Frontiers in Public Health found that green spaces influence elderly mental health through three key pathways: reduced relative deprivation, increased physical activity, and enhanced social trust.
“Green spaces may be particularly beneficial for older adults as they can provide safe opportunities to be active and interact with other people, while stimulating the mind and senses,” according to a Taiwanese paper on the elderly’s use of green spaces.
Physical Health: From the Heart to the Bones
The physical health benefits of green spaces extend well beyond what most people appreciate.
A 2024 study published in the Journal of the American Heart Association found longitudinal links between high greenness and improved cardiovascular outcomes. Related research has linked green space exposure to lower rates of obesity, type 2 diabetes, hypertension, and reduced heat-induced mortality — all conditions to which elderly residents are particularly vulnerable.
A 2025 Oxford scoping review confirmed that the majority of studies found significant associations between green space exposure and better physiological health, improved sleep quality, and enhanced perceived physical and mental health among older adults. For elderly residents who may already struggle with sleep disorders, the sleep quality dimension alone is a compelling reason to invest in green environments.
Enclosed or well-managed green spaces also act as a buffer against factors known to be harmful to older adults: noise, air pollution, and urban heat — three challenges only likely to grow as Australia’s cities densify and climate pressures intensify.
Designing Green Spaces That Work for Elderly Residents
Not all green spaces are created equal and accessibility is everything when designing for an ageing population. Dr Bird notes that as an elderly person’s world shrinks with reduced mobility, “access to even a small pocket of nature will be important.” Features that consistently rate highest among elderly residents include flower gardens, walkable paths, places to sit and rest, and spaces that engage the senses of sight, smell, touch and hearing.
A UK survey of adults aged 65 and over found that the pleasantness and safety of open spaces were directly linked to life satisfaction, and that the quality of paths leading to those spaces was a key determinant of whether residents would venture outdoors at all.
Both passive and active engagement with nature matter. Passive involvement — such as enjoying views of greenery from windows — carries measurable wellbeing benefits, as do regular excursions into outdoor green areas.
A notable global initiative is the partnership between Bupa and the RSPB (the UK’s largest nature conservation charity), which has been replacing manicured lawns in aged care settings with long grass, wildflowers and deadwood to attract wildlife — all with elderly residents’ input. Early results have shown measurable decreases in resident agitation. Australian retirement villages are increasingly looking to similar models, with sustainable design becoming a key point of difference in a competitive market.
The Business Case for Green Spaces in Aged Care
The investment argument is often raised as a barrier to greening aged care facilities — the view that money spent on gardens could go towards building more rooms. But the evidence challenges that calculus.
As Dr Bird argues, “the cost of withholding nature from a resident is high with a significant reduction in their quality of life, which then increases the spending on their health.” Lower rates of agitation and depression, reduced reliance on medication, improved sleep, and greater physical activity all translate to lower care costs over time.
There is also a market signal. As more Australian families research care options for loved ones, the quality and greenness of outdoor environments is increasingly cited as a deciding factor. Sustainable, nature-rich retirement villages are commanding greater interest — and with Australia emerging as one of the leading global contributors to research on green spaces and older adults’ health, the sector is watching closely.
Cultivating a Greener Future in Australian Aged Care
The evidence is no longer emerging — it is established. Green spaces make older people healthier, happier and longer-lived. They reduce dementia risk, lower depression and anxiety, improve sleep and cardiovascular health, and foster the social connections that protect against loneliness.
For Australia’s aged care sector, facing the largest wave of older residents in the nation’s history, green spaces are not a luxury. They are infrastructure for wellbeing — and one of the highest-return investments a residential care provider can make.
Programmed is passionate about supporting the retirement living and aged care communities through well-presented, nature-rich sites. Speak to us about open space maintenance and green space solutions that free aged care operators to focus on what matters most: their residents. Contact us today.
Green Spaces and Healthy Ageing FAQs
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Can spending time in nature actually slow down the ageing process?
Research is increasingly pointing to yes — at a biological level. A 2023 study using DNA methylation analysis found that people with long-term residential exposure to green spaces had a biological age up to 2.5 years younger than their chronological age. The research suggests greenery may influence the pace of cellular ageing, not just quality of life.
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How much green space exposure is needed to see health benefits
Studies suggest even modest, regular exposure makes a measurable difference. Research has shown that spending as little as one hour in a garden setting produced significantly greater improvements in concentration among elderly participants compared to remaining indoors. The key appears to be consistency and accessibility — small daily or weekly doses of nature are more beneficial than rare access to larger spaces.
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Does looking at greenery through a window have any real benefit?
Yes. Research consistently shows that even passive engagement with nature — viewing gardens or trees from a window — delivers measurable reductions in stress and improvements in mood. For residents with limited mobility, ensuring high-quality window views of green spaces is a meaningful form of nature access and should be a design priority, not an afterthought.
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Can green spaces help reduce medication use in aged care?
While green spaces are not a clinical treatment, there is growing evidence of indirect medication benefits. Studies have shown reductions in agitation, anxiety and depression among elderly residents with regular nature access — conditions that commonly lead to pharmacological intervention. Some residential care providers report reduced use of sedatives and anti-anxiety medications following the introduction of accessible green spaces and garden programs.
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Is the benefit different for men and women?
Some research suggests there may be sex-based differences in how older adults benefit from green spaces, with certain studies pointing to variations in the type of activity and social interaction that nature spaces encourage for men versus women. However, the broad health benefits — reduced depression, better sleep, lower cardiovascular risk, improved cognitive function — appear consistently across both sexes in the elderly population.
