Add a showstopper to your cactus collection with this easy-to-maintain centerpiece. We used thimble cactus, blue candle cactus, and barrel cactus to create this indoor or outdoor centerpiece, but you can also create the same look with succulents. You’ll need a shallow bowl with a drainage hole in the bottom, cactus soil, and gravel or small decorative rocks for this project. It’s important to use cactus soil or a succulent mix for this project or the soil will trap too much water and cause the cactus to brown or mildew. Keep your beautiful new centerpiece in a sunny location and water lightly when dry.