If your only outdoor space is a cemented one, you can still have a garden. Create it by planting directly into bags full of soil.
Spotted on Tree Hugger, these are garbage bags from Sweden. If you're looking for something a little smaller and easier, you can just use standard soil bags from your local nursery.
See step-by-step instructions here.
And for a better look, add hay around the perimeter to cover the bags.
Amy John Headley is a landscape designer based in San Francisco.