Crop rotations in So. Calif: When to change seasons

VCRW front 100 It’s autumn in Southern California.  Or is it?  The weather has changed.  Wait, it’s changed back again…

Contrary to what East Coast people say, Southern California does have its seasons.  But there’s rarely a clear “cutoff” date.  Add climate-change-driven Weather Weirdness to the mix and it can be totally confusing, even for veteran gardeners.

How do you tell when it’s time to change crops in your rotation?