It's Arbor Day, Charlie Brown (1976)

Plot

On Arbor Day, Charlie Brown's friends surprise him with a gardening project, transforming his beloved baseball diamond into a vibrant garden. When it's time for Charlie to face Peppermint Patty's team, he finds himself at a disadvantage playing in this unfamiliar terrain. Surprisingly, the quirky new setting offers unexpected benefits, and Charlie begins to thrive amidst the flowers. As the game unfolds, he discovers that sometimes, change can lead to unforeseen opportunities and growth, both on and off the field.