Gardening for Mental Health: The Best Low-Maintenance Plants for Stress-Relief Gardens in Tennessee
A 2011 study out of the Netherlands indicates that 20 minutes of gardening lowers cortisol levels more than 20 minutes of reading indoors․ So the short answer to whether gardening aids good mental health is yes․ And here's the real kicker: it happens much earlier than you might think․ Here in Tennessee‚ we have an advantage most mental-health-and-gardening articles never mention: the growing zones (6b through 7b‚ depending on where you are) allow us to garden for nearly 10 months of the year․ That's a big deal because those healing benefits are not limited to a summer spent in Minnesota or Maine․
That matters more than it sounds like it should․ Anxiety and depression do not stop at the end of October․ Neither should your garden․
Why Tennessee's Climate Actually Helps
Middle and East Tennessee are in USDA Plant Hardiness Zones 7a (or 6b for mountain areas of the Cumberland Plateau) and 7b (near Memphis)‚ which allows for cool season perennials to get started in March‚ natives accustomed to heat and drought to be put in the ground in June‚ and fall bulbs in the ground by late October․ For someone using gardening as a coping tool‚ that expanded season is the difference between a hobby you pick up for twelve weeks a year and a daily ritual you can return to almost year-round․
That's why low-maintenance‚ hardy plants are so important here; if a plant dies on you every few weeks because it wasn't suited to our clay soil or humidity‚ it doesn't decrease your anxiety‚ it increases it․ It's not a matter of not being able to garden but of needing to garden with plants that will actually reward the effort․
The Plants That Do the Most Psychological Heavy Lifting
Tennessee natives such as Christmas fern and autumn fern are nearly indestructible in shady‚ moist TN gardens‚ and stay green throughout most of winter in the warmer parts of the state․ Their presence throughout much of the winter may also well counter the seasonal affective disorder that afflicts people in winter․ A few TN Nursery cultivars bred for this kind of shade-garden hardiness are the most common first recommendation for people whose gardening is more about the mood than the eye․
Hostas‚ I think‚ do a similar thing in the shade garden․ They have big leaves‚ and thick stems‚ and they're like a big handhold‚ a place to grip when you're deadheading or dividing‚ and I think that that's much of the meditative power of gardening․ It's not the plant‚ but you choose one with enough body to withstand being lifted‚ inspected‚ and handled repetitively without falling apart and going limp․
Native ornamental grasses like switchgrass and little bluestem offer something to the garden competitor health-site articles rarely address: movement and sound․ You do not realize how much a garden of flowers lacks in these aspects until you have grasses swaying and rustling in the wind․ For anxiety in particular‚ that ambient sensory input has a regulatory effect similar to white noise machines used in therapy settings․
Give Your Best Estimate of a Timeline
Most wellness articles about gardening say it can help with mental health without telling you what to actually expect week to week․ Here's a more honest timeline based on what typically happens:
Weeks 1-2: You will notice the same twenty-minute drop in cortisol that we mentioned earlier․ It is the same principle that makes a walk outside feel good․ You're only adding another layer since you're tending to something living․
Weeks 3 to 6: In the third through the sixth week‚ the perennials that were planted a month earlier start to come up․ It's the type of small‚ more regular victories that behavioral psychologists say can help depressed people: you get a visible reward for your efforts in a timeframe that doesn't seem discouragingly long․
Months 2-4: After planting your spring garden‚ you are fully engaged in maintenance: weeding‚ watering and light pruning․ According to Penn State Extension's gardening programs‚ occupational therapy research shows that repetitive motions consistently give the benefits of mindfulness you would experience in yoga․
Ongoing: The garden becomes a fixture rather than a project‚ and this is where the sense-of-purpose benefit that the Mayo Clinic research and the NCBI research both point to really kicks in․ You have somewhere to go‚ something with needs that depend on you showing up․
What Competitor Health Sites Get Wrong (or Skip)
Research literature into the positive mental health effects of gardening is large and often rigorous (for example this well-cited NCBI review of horticultural therapy)‚ but typically doesn't distinguish much between activities: raking leaves‚ transplanting seedlings‚ and deadheading roses touch different aspects of the activity․ Repetitive tasks like raking leaves‚ weeding‚ and deadheading have a meditative effect and help reduce stress․ However‚ more complex tasks (designing a bed‚ or what plants to put together) need more focus and are better described as flow‚ rather than mindfulness․ Neither is better‚ but the danger of using the words interchangeably is that people may expect too much from the garden in one afternoon․
But there's very little practical advice (in the clinical literature‚ that is) about which plants actually make this sustainable․ Especially for participants with active low energy from depression‚ a garden full of finicky annuals that require daily attention and still die in July heat will prove to be more draining than therapeutic․ So when we talk about horticulture as a coping strategy‚ we might suggest native ferns‚ hostas‚ or drought-tolerant perennials to the average gardening client․ You need plants that can survive for a week‚ because the point is to relieve stress‚ not to create more․
Starting Small
One need not start with a major transformation‚ a few pots of ferns on a shaded porch‚ or a small perennial bed along a fence line‚ is enough to establish the habit․ What's most important is the frequency of your efforts․ A few minutes most days will trump the once-a-month weekend marathon․ The growing season in Tennessee is longer than that‚ so you have more room
