If you need plants this season, you can still get them at Woodhead Gardens in Orem. See their website for the location at woodheadgardens.com. They have a self serve plant stand, so you can go at any time.
If you haven't yet toured their garden or would like to see it again, they have tours starting on the hour between 10am and 7pm every Thursday. It is an amazing example of a self sustaining, mass producing garden in a small space.