Our beds are about 4 feet wide and 48 feet long. Just about everything we go is high density, (translation-labor intensive), since we don't have that much sunny areas to grow in. Last year we planted 4/6 inches deep, about 20 inches apart and put 2 rows in the bed. After they grew up to 18 inches tall we added more soil crearing mounds. We just kept adding to the mounds until the plants died off, after a couple of weeks dug through the mounds and collected them.