This is called a Swedish flame. Make your cuts like you're cutting cake, leave about 6 inches at the base, throw about a cap full of fuel oil in it. It burns up to two to three hours Can use olive oil instead of fuel oil :-) Any oil will burn!
Nice layering in shady bed. The first layer is Sagina subulata, Scotch Moss. Then recycled, tumbled glass which you can buy by the pound some places. Next is Ophiopogon japonicus 'Nana' and lastly is a Lirope