Abstract: A raised bed planter box includes a first corner post, a second corner post, a third corner post, and a fourth corner post. Each of the corner posts defines a first open-ended channel and a second open-ended channel positioned at an angle of about 90 degrees relative to the first open-ended channel. A first sidewall extends between the first open-ended channel of the first corner post and the first open-ended channel of the second corner post. A first end wall extends between the second open-ended channel of the second corner post and the second open-ended channel of the third corner post. A second sidewall extends between the first open-ended channel of the third corner post and the first open-ended channel of the fourth corner post. A second end wall extends between the second open-ended channel of the fourth corner post and the second open-ended channel of the first corner post.