In am going out today to pick what is likely the last of the raspberries. We have four nights in the coming week projected to have lows in the 28-29 range and most of the bushes and berries won’t survive it. I usually clip off the dying ones and if there are any surviving, leave those. Usually the very last thing I do in fall is to clip the bushes down to a foot or so and let the leaves pile up to insulate the bushes for the winter.