Hey Spart!
I love the South of France! Lived in Provence for a short while.
We have it hotter here (southern Mediteranean ) than you do in the SOF. Nevertheless for the Autos it is a risk I took for an early harvest to tide me over till the photos are done in October.
Fortunately for me I came to cannabis cultivation with 21 years of mainstream gardening under my belt. So I am a great believer in choosing the correct genetics for my growing conditions - beyond that I don't ever baby anything, .not even my canna grow. If a strain does not like the growing environment I just never grow it again. Cannabis is an incredibly robust and resistant plant, and there are enough strains available for one to never have to battle growing conditions to keep ones plants alive and thriving.
That's why much as I love reading about all the exciting new strains, I stick to buying tried and tested strains from breeders with past proven form and robust R&D credentials. I find that when one chooses strains to match ones growing conditions the plants grow effortlessly and shrug off small problems much as they would do when growing in the wild.