A rolling stone gathers no moss, but a tombstone (and my patio) gathers plenty.  So if you want a realistic looking tombstone you’re going to need to find a way to add some realistic moss that will stick to it.  Troy from Halloween Hellmouth has a great method that produces a great looking moss for any prop utilizing a mixture of pre-dried moss and paint.  You can buy dried moss at most craft stores, but if you have access to moss you can dry it out for a couple of days and use it. You’ll start by puréeing the dried moss in a blender and then you’re going to start mixing your paint until you get your desired color.  Once you’ve got the correct color mix you’re ready to start spreading it onto your prop.  Use your fingers to spread it and don’t worry if you’re a bit sloppy because moss doesn’t exactly grow straight.  After you’ve spread the moss mixture onto your prop you’re going to want to wait for a good three days for the entire  mixture to set, which sounds like an inordinate amount of time to wait for something to dry, but trust me, it’s worth it.  The end result looks amazing.  Troy adds even more detail by tea staining his moss application, but even before doing this his method is a success.     Items needed to create this include: Bag of  moss (or actual dried moss) Paintbrush Mixing stick Mixing bowl Spray bottle filled with water Drip pan (for water to drip in to) Acrylic paint...