Zach Galifianakis is going from between two ferns to surrounded by carrots, radishes, corn and a whole bunch of other plants. The comedian and “Hangover” star is hosting a series for Netflix about gardening, aptly titled “ This Is a Gardening Show .” The series debuts on the streamer on Earth Day (April 22) with six 15-20 minute episodes. The show is described as “a refreshing and whimsical take on gardening” that blends comedy and an earnest appreciation for the planet and all the people who