I know I've pinned this here before - Moss Graffiti. Just mix some moss collected elsewhere with yoghurt or buttermix in a blender and apply with a brush to a textured/porous wall like brick or concrete. Spray with a water mister if the weather is dry.
MOSS GRAFFITI - As people become more eco-friendly and environmentally aware, the idea of making living, breathing graffiti has become an exciting outlet for graffiti artists. Also called eco-graffiti or green graffiti, moss graffiti replaces spray.
Beautiful Preserved Living Moss framed by two pieces of live edge black walnut. These preserved moss art pieces are a little new to Etsy Shop. These wall art pieces are so natural and very dramatic for any wall.