For me the biggest challenge has been learning to use the longer growing season. I am used to gardening in the northeast and putting the garden 'to sleep' for the winter. Here in Savannah it seems we should be planting all the time.
The hot sun was a problem for a while until I learned to utilize a lightweight beach umbrella and sit under the shade it provided. Work smarter, not harder!
Of course, all that was before the neighbors let the pet rabbits go, so my next challenge will be adequate fencing and much taller pots for the container garden area.