Henrietta: Maybe this will help!
Hi Henrietta, To make faux moss, add a batch of dryer lint with some craft glue and two or more shades of green paint (image 1). With a gloved hand, gently mix the lint and liquids until all are moss-colored
You can buy sheets of real moss! I got some at the dollar store. Craft store have it too.
Super cheap to buy
You can buy it loose or in sheets.
Buy a bag for about a dollar.