Best Wood For Organic Raised Garden Beds - When vegetables that are growing in raised garden beds using the Square Foot Gardening approach, your beds will have to be sectioned off into one-foot sections 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). A 4x8 foot garden bed will have 32 planting squares. Each planting square has an address used to recognize the square.
Among the simplest is to utilize letters for numbers and columns for rows while for addressing the methods vary, and the mixture of the two identifies the square. Numbering beginnings in the upper left corner and goes left to right, top to bottom. For example, 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 the 4th row. I've yet to locate a garden bed that is commercially available for marking off planting squares with an enclosed attribute.
I wish somebody would develop a Square Foot Gardening grid which you can fit into a garden bed that is raised to mark off squares, but until this is available, if you want to make use of the Square Foot Gardening method, for marking squares off you'll need to devise your own strategy. Step one will be to compute the dimensions on the interior of the garden bed, that is the length and width that's in fact useable for planting.
But when you connect the boards at the corners, you lose several inches, or so the interior dimensions of the garden bed are really a few inches short of the advertised size. In my own instance, my beds have an interior measurement of 46.25 inches x 94 inches. I refer to these dimensions as Usable Length for the rest of this post.