Courtesy of Wally S., Wally's Urban Market Garden, Saskatoon SK
Crop repertoires always vary from year to year. SPIN farmers aim to change up their offerings, experimenting with exotic crops, and providing those not offered by their competition. Keep an eye out, too, for crops that are in short supply. Right now at my market, onions are in short supply. So my plan for 2016 will include more plantings for storage onions. The demand for garlic is exceeding my supply also, so I will increase my production there too.
There is no cabbage at market, so even though it is a difficult crop to grow for me, I'll put in a cabbage planting for next year. My carrots and pumpkins/winter squash are selling steadily so I see no need to increase 2016 plantings of those crops.
My point is that you can continue to make money during what is considered the off-season by observing and responding to local food supply. By keeping your customers happy longer, you not only keep your cash flowing, you also ensure their loyalty. You can even gain new customers once their usual farmer is missing in action.