Salvaged boots that are practically brand new are too pretty to plant with dirt. The perfect solution is a plastic bag of gravel in the bottom and a plastic cup with floral foam to hold the plants. The foam holds everything in place better anyway. After the flowers have faded, the succulent cuttings will root and continue to grow if watered occasionally.
This faux snakeskin boot needed a little more tropical look, so I added some carnivorous pitchers.