These rain boots were filled with Impatiens at the Botanical Garden's last summer, you'd have to make sure you poked some holes in the bottom so they would drain. They look like old black boots that were sprayed painted red.
These were also done up at the Garden's. I am not sure how the suitcases would do in the rain, these were under cover, so they weren't directly exposed to the elements.
This window is from the farm that my husband's grandparents lived in. We hung it up from the pergola and it makes the deck feel more like a room.
So many things can be found at yard sales and thrift stores, or better yet buried in your closets or garage. (and you'd be surprised how many curb finds are garden worthy)
This wrought iron piece was a reject from a friend, I'm not exactly sure what it's original use was for but I thought it was perfect for holding a couple of potted plants.
Hope I have inspired you, keep your eye out for things you could use in your garden.