Grow A Garden On Your Balcony Or Rooftop Even if you only have a tiny balcony to work with, you can grow fresh food and flowers there. You've probably already considered container gardening - but what about vertical gardening with vining plants that can grow up the wall or using a vertical aeroponics gardening system that can grow 20+ plants in a 4 square foot area? And rooftops are the perfect spot for an urban garden! Not only will you love all the fresh food but the building owner will love the reduction in their heating and cooling bills and the fact that the rooftop will need less repairs and maintenance due to the protection from the plants.