I currently have a Hardy Chicago from Willis Orchards and there is enough room for exactly one more tree. Which variety should I get and where do you recommend buying it? It will be grown hydroponically outdoors during warm weather. Ideally, I would like to start with an established tree somewhere around 5 or 6'. I only have about 20 square feet to garden in, so I don't want to have to wait years to get a significant amount of fruit. Right now, I am considering a Violet de Bordeaux from Edible Landscaping, but I am open to your suggestions if you know of something better or a reason to avoid this variety.