Quote from my mom in social media a few weeks ago: "How does the November cactus know that it's November?" with a picture of the flowering cactus. We don't have

Quote from my mom in social media a few weeks ago: "How does the November cactus know that it's November?" with a picture of the flowering cactus. We don't have a true Arctic night at these latitudes, but thanks to the mountains it's close.