Horticulturist's of the past came up with a brilliant recipe to encourage the growth of moss to age and add interest to their garden designs, this recipe can be used as an an environmentally friendly alternative to spray paint.
The success of the recipe itself can be very hit and miss and is very much dependent upon choosing exactly the right location and weather conditions; moss thrives in the damp and can most often be found growing near to a leaky drainpipe or rain-soaked wall. If you have difficulty finding the right climate in which to grow your moss, grow it indoors (where it can be frequently spray-misted with water) and transplant it outdoors as soon as it has begun to grow. This is what I have done in the example shown in this instructable.
*Several clumps of moss
*1 pot of natural yoghurt or 12oz buttermilk (experiment to see which works best)
*1/2 teaspoon of sugar
*Plastic pot (with a lid)
nb If growing your moss inside you will also need a seed tray containing compost
Step 1: Find some moss
Moss can often be found growing in damp areas, between the cracks in paving stones, on drainpipe covers or, in this example, near to a riverbank.