Raised Garden Bed Design Slope - When vegetables that are growing in raised garden beds using the Square Foot Gardening approach, your beds should be sectioned off into one-foot segments called planting squares. A 4x4 foot garden bed, for example, will have 16 planting squares (because there are 16 square feet in a 4x4 bed). Each planting square comes with an address used to identify the square.
While for addressing the methods vary, one of the simplest is to make use of letters for numbers and columns for rows, and the square is identified by the mix of the two. Numbering beginnings in the upper left corner and moves 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 and also the 4th row. I've yet to find a garden bed that is commercially available for marking off planting squares, with an included attribute.
I wish somebody would build a Square Foot Gardening grid which you can insert into a garden bed that is raised to mark off squares, in case you prefer to use the Square Foot Gardening process, but until that is available, for marking squares off, you will need to devise your own personal procedure. The initial step will be to figure out the measurements on the inside of the garden bed, which can be the length and width that's truly useable for planting.
But when you join the boards at the corners, you lose several inches, therefore the interior measurements of the garden bed are actually a few inches short of the advertised size. In my case, my beds have an interior dimension of 46.25 inches x 94 inches. I refer to these measurements as Useable Span for the remainder of the post.