Two seasons

Perfectly normal photo, what's special about that? you may ask. Yes, normal for October, but these vegetables came from the open air in my garden this week and it's nearly December.
It's been a warm November with temperatures in the mid 20s, T-shirt weather, till last weekend when the meteo came to its senses and started doing autumn - well, more or less winter. For the last couple of years here in the south of France it has seemed as if the transitional seasons of spring and autumn have been cancelled, leaving us with the two extremes. Last week a market gardener offered me some radishes: 'They shouldn't be growing now' he said with a shake of his head. 
What's wrong with lots of summer? Plants get exhausted, pests and diseases thrive because they don't get killed off in a mild winter, and yield goes down. Growing zones get pushed further north - possible for some plants, but others lose the soil types they are adapted to, and wild plants and trees can't relocate fast enough. My landscape, your landscape will change, there's no doubt about that, as global average temperatures are certain to rise by more than 2 degrees.
Fifth in a series on climate change ahead of the Paris conference starting on Monday.