In my 20s, I would relax by watching shows like The Wire or having a horror movie marathon, but since I had kids, my definition of a relaxing hang is "under 90 minutes and, please, nothing too stressful." Basically, that leaves me with PBS cooking shows (America's Test Kitchen for life) and reruns of Brooklyn Nine-Nine.  But this past weekend, I decided to try This Is a Gardening Show, the new Netflix docuseries hosted by Zach Galifianakis. Because what's a gardening show, if not just a prequel to a cooking show? Galifianakis' brand of comedy isn't always for me, but This Is a Gardening Show tamps down his signature uncomfortable silences and deliberate awkwardness, instead showing off the performer's genuine side and revealing his passion for nature. From the first few moments of the series, Galifianakis makes it clear that, as a longtime gardener, he finds great joy and peace in the practice, and that understanding the natural world is essential for society to function and thrive.…