“I cannot say exactly how nature exerts its calming and organizing effects on our brains,” the poetic neurologist Oliver Sacks wrote in the dawning years of the twenty-first century, “but I have seen in my patients the restorative and healing powers of nature and gardens, even for those who are deeply disabled neurologically.”

As a writer, I find gardens essential to the creative process; as a physician, I take my patients to gardens whenever possible. All of us have had the experience of wandering through a lush garden or a timeless desert, walking by a river or an ocean, or climbing a mountain and finding ourselves simultaneously calmed and reinvigorated, engaged in mi... See more