The cost of cable can vary depending on your desired material for your exterior railings. The most affordable option employs wooden posts, whether you have a few lying around or need to purchase them.

As you'll see below, the "know-how" part is easy — the skills needed to construct a wooden railing planter are rudimentary.

Trex Company (NYSE:TREX), the world’s largest manufacturer of wood-alternative composite decking and railing, and a leader in high-performance, low-ma ...