"A 9 foot x 6 foot north-west facing foot balcony, 5 south facing window sills, 3 north facing window sills, and a small patch of concrete outside the front door. Is this enough growing space to keep a family in vegetables most of the year?"
This small court yard has been made to feel very welcoming with the use of concrete and hard surfaces. I think the warm lighting helps. I really like the retaining borders. http://www.uk-rattanfurniture.com/product/popamaing-high-quality-waterproof-outdoor-wicker-rattan-garden-bench-furniture-protective-cover-patio-tables-chairs-cover-wicker-rattanxl96-5x65x22/