The possibility of growing moss graffiti occurred to me during one of those dull days at work when your thoughts wander. A quick internet search showed me that I wasn’t the first person to ask the question “How does moss grow?” In fact, many genius gardeners had even come up with a recipe for a moss milkshake! Next I wondered if you could use this recipe to grow your own designs and create a kind of moss graffiti, and it would appear that you can!