If you have limited space for you plants the perfect solution is to hang them. We have a beautiful range of botanical artificial hanging baskets which never need water so that saves all the dirt drip marks on your lovely furniture! http://www.uk-rattanfurniture.com/product/home-arena-garden-rattan-furniture-set-available-in-black-or-brown-brown/
great passive solar design- I would plant row of deciduous trees in front of glass so that in the winter that could act as a giant trombe wall but be shaded to keep it cool in the summer. Trees that max out at 2 stories would allow south face 3rd level roof to accommodate panels!