Am having the same problem with Bailey (16wks tomorrow) as she cannot stay out of the potato patch or the strawberries
Both were fenced off but Bailey was undeterred by this.
Having had a strawberry plant redecorate my living room last week and another 2 being used for playing tug of war (with my 15mnth old cocker who seems to have regressed back to puppyhood) I have relented and got rid of them.
I have also found potatoes (that have been dug up) on my lawn on several occasions so again I have got rid.
The two areas are now gone or covered completely.
Awful thing is Jazz was never like this as a pup and although she did hide in my strawberries she was never destructive, she is now making up for this as I have 2 excavators in the guise of cockers
It maybe a bit drastic but it has worked and luckily they have not transferred their digging anywhere else (yet!!)
I don't however have the growling or barking just innocent looking faces covered in mud so not sure the best way to deal with this except maybe distraction as mentioned before.
Good luck, it will get better