I live in the south of France where it gets very hot. I have just moved to a new house in town and I have a little north facing balcony which is right next to the kitchen and which I think I could use the extra dishwater to water a few vegetables. There are buildings all around on which the sun will reverbarate and a glass roof which will let the high summer sun come down (maybe 4 hours of direct sunlight).
The space is quite small (1. 5 m2) but am thinking why not use this space. A few tomatos, maybe green beans and some lettuce? Any ideas? I do have a big roof terrace but past owners have told me that it gets so hot that you have to water constantly. Maybe someone has some advice?