Q.If you cut a blackberry patch down to the ground will it revive itself…so many issues from wet weather, birds, deer, and not having
someone to talk with or see my issues..hopefully your advice will get me started to try to save my patch or not.. with a computer I’m like a 2 year old trying to fly a jet airplane…just learning and saw your ASK A GARDEN QUESTION…I know I won’t get a crop next year but maybe I can get a hand on it for the following year…

Certified GKH Gardening Expert
If you want the bushes to produce again it would be best to cut back the canes to 6 inches or so, starting with the outside ones and moving to the interior of the bush. Here's an article that will help: https://www.gardeningknowhow.com/edible/fruits/blackberries/blackberry-pruning.htm
https://www.gardeningknowhow.com/edible/fruits/blackberries/growing-blackberry-bushes.htm
https://www.gardeningknowhow.com/edible/fruits/blackberries/watering-blackberries.htm
https://www.gardeningknowhow.com/edible/fruits/blackberries/fertilizing-blackberry-plants.htm
https://www.gardeningknowhow.com/edible/fruits/blackberries/blackberries-not-fruiting.htm