by Quinn O'Neill
Seattle residents have a brilliant plan in the works. They're building America's largest “food forest”. It's going to be a 7-acre plot with hundreds of edible plants, including walnut and chestnut trees; blueberry and raspberry bushes; fruit trees, including apple and pear trees; pineapple, yuzu citrus, guava, and persimmons; honeyberries and lingonberries; and herbs. According to this report, “All will be available for public plucking to anyone who wanders into the city's first food forest.”
I think this is a fantastic idea. Why haven't we been doing this everywhere?
The potential benefits are innumerable. The most obvious perk might be aesthetic, but lush blossoming trees and greenery are more than just eye candy. Exposure to vegetation also has benefits for mental health, reducing anxiety and improving mood. Memory gains and improvements in mood as a result of nature walks have even been reported in adults suffering from major depressive disorders.
The mechanism underlying the mental boost isn't clear. Neighborhood greenery could encourage people to spend more time outdoors, more time engaged in physical activity, and more time mixing socially with other community members. These factors probably play a role, but they don't tell the whole story. Even looking at photos of vegetation can help to focus attention and reduce mental fatigue and stress compared to looking at similar photos with no vegetation.
Of course, Seattle's food park isn't just about greenery, since much of its botanical offerings will be edible. Given the prevalence of obesity, poverty, and food deserts in the US, we might also expect some improvement in physical health as a result of better nutrition. The park's fruit and berries may not be adequate to steadily supply community members, but this might not be so important. Just encouraging experimentation with novel food items – particularly the more exotic ones – can inspire people to buy them when they go grocery shopping. Shoppers encountering persimmons or guavas for the first time might be deterred by the unknown: Do you have to peel them? Can you eat the seeds? Do they need to be cooked first? With park visitors inadvertently offering free demonstrations of how to eat the foods, overcoming these knowledge barriers would literally be a walk in the park.
