Tiered Raised Garden Bed Design - When growing vegetables in raised garden beds using the Square Foot Gardening method, your beds should be sectioned off into one-foot segments called putting squares. A 4x4 foot garden bed, for example, will have 16 planting squares (because there are 16 square feet in a 4x4 bed). A 4x8 foot garden bed will have 32 planting squares. Each putting square has an address used to recognize the square.
One of the most straightforward is to use letters for amounts and columns for rows while the means of addressing change, as well as the mixture of the two identifies the square. Numbering starts in the upper left corner and goes left to right, top to bottom. As an example, putting square A1 is the upper left hand square (1st column, 1st row), while putting square C4 is the square in the 3rd column and also the 4th row. I've yet to locate a commercially available garden bed for marking off putting squares, with an enclosed feature.
I wish somebody would create a Square Foot Gardening grid which you can insert into a garden bed that is raised to mark off squares, but until this really is available, in case you want to use the Square Foot Gardening approach, for marking squares off you'll need to formulate your own personal strategy. Step one will be to figure out the measurements on the interior of the garden bed, that is the length and width which is in fact usable for planting.
The 4x8 foot garden beds I bought, for example, are 4x8 feet from end to end. But when you join the planks at the corners, you lose several inches, or so the interior measurements of the garden bed are really a few inches short of the advertised size. Within my instance, my beds have an interior dimension of 46.25 inches x 94 inches. I refer to these measurements as Usable Length for the balance of this article.