Look at these raised garden box and trellis combo examples I have spotted earlier today. They are an awesome use of space in a small backyard garden. They are perfect for growing cucumbers, peas, beans, and many more.
You can build your Raised Garden Box & Trellis Combo with wooden box, or even cinder blocks. Here is a nice step by step tutorial for How To Make Raised Garden Box & Trellis Combo
Watch the video to see how it looks when things start to grow.