This is a cool idea @papa-pepper! I like @coinsandchains suggestion too! The moss certainly would cut down on the weed problem and look awesome too. Happy to hear that you have hummers coming to your garden. They are at the top of my favourite birds' list. This morning when I came into my kitchen they were 5 little hummers at the window where my son planted red Canna lilies. It always brings joy to my heart when I see these little beauties...