Thanks David, Susie, and Lynn! The wheelbarrows got a different treatment, as I painted those with soil in them. I sprayed the metal part and used a piece of cardboard to shield the wood handles, and brushed the wood.
Found a few more pics while looking through my files.
The colorful containers have been a nice way to make plants that aren't really very showy during summer look nicer grouped among the others. Amaryllis and Clivia for example, do well on the shady deck, but are pretty dull in summer. I used to put them in out of the way places, but would forget to care for them- out of sight, out of mind. This way they get a nice dose of plant food with all the others, and frequent watering.