Here's a great way to repurpose those spare bits of rain gutter from that construction site down the street. These trough planters are a great addition to any garden. Here's how I made mine using only the left over materials from other projects.
Step 1: Collect Tools & Materials
If you have a construction site down the street, it might be a great place to find good materials for a variety of projects. Make sure you get permission from the person in charge before you take anything. In many jurisdictions, even taking things out of the dumpster is technically theft, so don't do that. I was able to get three 8 ft lengths of left-over rain gutter from the new development in my neighborhood.
You will also need sheet metal and rivets or screws. I used the body from an old microwave that I got from freecycle. It's dirty and greasy, but that's perfectly fine with me. These garden planters are going to be outside holding soil anyway. It's not like I'm going to eat off it, per se.
The rest of the materials really depend on how you are going to mount, hang or attach the planters to a support structure. I used some old bits of cardboard, wood, pvc, conduit clamps to create legs for my three planters.
The tools I used are a hammer, rivet tool and rivets, a drill and various drill bits, C-clamps, an angle grinder with a cutoff wheel, tape and a permanent marker.