Trying a garden - one more time!

We decided to try to have a garden - one more time.  This is a keyhole style with soil not of our own ground.  We hope having it partially shaded under the Mulberry tree will help it survive the heat and we also hope the soil that we created to fill it will also help since our soil here is not really great.  So far so good...we will have to get an awful lot of produce to anywhere begin to recoup the costs! At the moment it is doing very well; we have picked lettuce leaves twice, the plants are growing well and the seeds have sprouted.