I will give it a try, you know what I was thinking is to put a 45lb weight over plant from my weight bench, you know, slide it through the hole. Then once it is established a little bit slide weight off before it gets to big to. I know they are stout little creatures but idk if they could toss around a 45. What do u think?
If you only have one raccoon that's been digging then that might work short term, but if you have several of them then you are gna need to either:
A) get rid of raccoons by trapping or killing
B) raccoon proof your area w hardware cloth, predator urine, electric fence, etc
and you might try putting some food down in area as far from your grow as possible to get them to focus on something else, in addition to the other steps...
Or
C)JUST MOVE!
Good Luck!