We planted really late this year but still managed to eke out vegetables from our patio garden, including a most excellent cucumber (see pic at right) with several more still in the growing stages. I'm about done trying to grow radishes, though. The few years we've tried, we have received very little for our efforts. Instead of the nice round radishes grown by real farmers, our radishes grow tiny, thin, and pink. So not worth it.
For future reference, this year we also planted parsley, snap peas, and spinach.