Several years ago I bought a wooden trellis. As my roses grew the wood on the bottom of the trellis began to rot. Finally my roses started to lean and I had to cut them back to replace the trellis. Our new large rectangular trellis is made of 100% aluminum which will not rust or rot. It has two 10" spikes to hold it securely in the ground. It can also be attached to a wall as a wall trellis.