I have a strong desire to have a flourishing garden with lettuce, carrots, strawberries, a plethora of herbs, money, and maybe a few types of peppers. I also have a garden located in a corner with minimal sun contact, a short attention span, and a blacker than black thumb.
I needed a system that could be moved to different locations, say if I needed more sun ... or less sun. I wanted it to be affordable (cheap) and built by me.
A length of 4" PVC pipe and a bunch of 4" caps should do the trick. I already had PVC cement and bailing twine.
Step 1: Cut Sections in Half
First , cut the PVC pipe into sections on a miter saw. Mine are around 36", but you do whatever works for your space. Then, set up a fence on a bandsaw and cut these sections in half. I wouldn't use a tablesaw because the PVC will close in and pinch the blade, which is a recipe for kickback. You could use a hand saw or a jig saw I suppose.
Step 2: Glue on the Caps
Glue on the end caps using PVC cement and a few clamps.
Step 3: Drill Some Drainage Holes
Pop a couple holes in the bottom so water can drain out. I used a drill press, but a hand drill would work. A nail and hammer might even work if you aren't Thor.
Step 4: Hang 'em Up and Fill 'em With Dirt
Drill a hole in the top of each cap, run through twine and make a knot. I made them different lengths so I could stack three on one post. I also had some scrap burlap that I put in the bottom before I filled them up with dirt, which was just to help keep the dirt from washing out of or clogging the drainage holes.
You probably want to put Herbs in your hangers, but I saw something shiny and had to go check it out, so I never got around to it.