I pulled a variety of plants at the end of the season last fall. No more corn, tomatoes, beans, or cucumbers. I didn't pull what was left of the kale though. Maybe the reason why I left them was because the plants were still green, and I figured I would chalk up their death to the winter cold.
I was in the garden today looking at things and planning the layout for plants. By the looks of the kale it wasn't as dead as I thought it would be. Looking closer I see there is new growth coming on. Now, I have to decide if I'm going to pull them or not. If not, I sure have a head start on the season.