start small, and only grow what you know you and your family will eat. if planting in the ground, a 10' x 10' garden (100 square feet) is a managable size. pick 3 to 5 of your favorite vegetables and buy 3 to 5 plants of each one. if planting in a raised bed, a 4' x 4' or 4' x 8' is a good beginner size.