What to do in September in the garden?

Say goodbye to the scorching summer sun and hello to the mild september weather. The summer holidays are coming to an end and now it's time to get back to work and school.
However, there is still time to enjoy the garden for a last meal on the terrace and why not enjoy the last barbecue of the year.
September is back to school so we're getting organized! 
Discover the work to be done, what to plant and what to harvest.