Plastic Raised Vegetable Garden Beds - When vegetables that are growing in raised garden beds using the Square Foot Gardening method, your beds should be sectioned off into one-foot segments called planting squares. A 4x8 foot garden bed will have 32 planting squares. Each planting square comes with an address used to identify the square.
While the means of addressing vary, among the most straightforward is to use letters for amounts and columns for rows, and also the square is identified by the combination of the two. Numbering starts in the upper left corner and proceeds left to right, top to bottom. For instance, planting square A1 is the upper left-hand square (1st column, 1st row), while planting square C4 is the square in the 3rd column as well as the 4th row. I have yet to locate a commercially accessible garden bed with an included attribute for marking planting squares off.
I wish somebody would build a Square Foot Gardening grid that you can add into a garden bed that is raised to mark off squares, but until this is accessible, should you would like to make use of the Square Foot Gardening approach, for marking off squares, you'll need to formulate your own personal procedure. The initial step is to compute the dimensions on the interior of the garden bed, which can be the length and width that is really usable for planting.
But when you connect the boards in the corners, you lose several inches, so the interior dimensions of the garden bed are really a couple of inches short of the advertised size. In my own instance, my beds have an interior dimension of 46.25 inches x 94 inches. I refer to these dimensions as Useable Length for the remainder of the article.