Your plant caddies, as with any furniture or decorations, should match the décor of your home and outdoor living areas. If you like a classical or formal look, most likely a cast iron plant caddy will appeal to you. For a little dash, a Bird, Sun or Frog plant caddy can add a whimsical touch. Cast iron is also the heaviest in weight of the types of plant caddies made.
For a casual look, or for accents on a bright porch or patio, a painted or finished Pine wood plant caddy is a welcome addition. The nice thing about pine is that you can always repaint it (oil-based only) if you want to change the color.
Cedar plant caddies are amenable to either a formal or a casual look. Their appearance can be changed with stain or a coat of paint to fit in where needed.
The balance between the size of the saucer, the pot and size of the top of the pot are important. Normally, the plant caddy should be at least an inch larger than the size of the saucer. In the case that the top of the pot is much larger than the saucer, it’s best to match the top than the saucer. Aesthetically, it will be more pleasing and it will also give it more stability.
A square pot or saucer usually looks better on a square plant caddy and a round pot on a round or roundish (e.g. octagon) plant caddy.