The most important thing that you need to know to have a productive square foot garden is how to care for your plants. This includes what to plant, when to plant, and how to space each plant properly.
With square foot gardening, the key is to space plants evenly within an area that is measured in square feet. So, if a plant like a pepper needs 1 square foot to grow, you would plant 1 in a square foot. Plants that need less space such as onions will allow 9 plants in each square foot.