Flowers do something candles and fruit baskets never could — Rutgers University psychologist Dr. Jeannette Haviland-Jones proved it herself. In a double-blind study at her Human Emotions Lab, every single person who received flowers responded with a Duchenne smile — the rare, genuine kind that reaches the eyes, not just the mouth — and three days later, they were still happier than everyone else in the study. Wildflowers, garden blooms, a single stem in a kitchen vase: none of it is decoration, according to the actual data. It’s one of the few gifts science has caught working exactly the way it looks like it should. These 10 gardening hobbies prove that growing plants, flowers and wildflowers with real kindness still brings genuine happiness into any home.