Whatever we think is the way to a more spiritually fulfilling life—no matter our tradition, culture, or inclination—most likely it will never be found behind a glowing screen.
In guru-speak, the outdoors is where humans first met God (in whatever that means). Our ancestors were taught in the outdoors and every culture has its tales of pilgrims and heroes meeting spiritual fulfillment there. Often, it was the deeper into the wild, the deeper the experience.
Even on the micro-world of our own own gardens, it can be a space where "we can restore our emotional and spiritual balance and nourish our senses and souls, away from the noise of everyday life." The garden is a facilitator.
Early gardens paid worship to gods and the dead. Gardens in Egypt were often found near tombs of the elite. It may've been the Romans who first secularized gardens and treated them as an extension of indoor space. It could be said that gardens engage all five of the human senses in a way few experiences do.
More than anything else a garden is a portal, a passage into another world, one of your own thoughts and your own making; it is whatever you want it to be and your what you want to be.
Green is the fresh emblem of well-founded hopes. In blue, the spirit can wander but in green it can rest.
Some of the ideas in this post were found in The Spiritual Garden: Creating Sacred Space Outdoors by Peg Streep and John Glover.