Polyvinyl chloride is more commonly known as PVC. PVC is an inexpensive plastic that is very strong, and lightweight. It is commonly used as wire insulation, home siding, and lightweight pipes. The pipes are used to for home plumbing, as well as in home projects. Inexpensive flowerpots can be made with PVC pipes and a few other products.
Purchase PVC pipe in a diameter you need. Small seedlings and herbs fit well in 4-inch pots, while larger houseplants need a diameter of 10 or 12 inches.
Cut the pipe at lengths equal to the diameter, using a hacksaw. For instance, if the diameter is 4 inches, cut the length to 4 inches also.
Attach a PVC end cap to one end of the cut PVC pipe. Use PVC adhesive to make the union permanent, and to create a watertight barrier. Allow the adhesive to dry completely.
Drill a hole in the center of the end cap, using a drill and 1/2-inch drill bit. This hole will enable the planter to drain excess water away from the plant.
Turn the planter right side up and use coarse sandpaper or a file to smooth out the rough edge of the uncapped end.