In autumn you can still sow some rocket as it is quick growing and relatively hardy. That said as the weather is likely to be cooler try growing it in troughs or pots filled with multi purpose compost and place on a warm patio or near a wall to give it some shelter. It is even better if you have a greenhouse or polytunnel to grow a late crop in. Pluck a few leaves for a salad or stir fry when they are large enough to handle.
