It seems that a neighbor of mine is so desperate for nature that they are attempting to grow cow grass on the concrete stairs landing. I hope they know that soil is needed to retain water which will then be absorbed by the plant roots. But then again, a lot of the grass patches in Singapore are grown on equally thin layer of soil. A quick probe by the soil auger will hit concrete without much effort. I'll be really curious to see how long this grass patch survive in its concrete home.