1) " that won't grow here."
I won't believe you. Give any plant it's needs and it will be happy anywhere. Is it feasible? Maybe not, but "it's not feasible to grow that here" is a value judgement- not a fact.
2) "beer kill slugs"
Please lets stop this one.
I won't even pretend a plate of beer in my garden is any control over slugs and snails thst eat my lettuce-
besides a few unlucky squishes that get drunk, fall in the beer and drown.
Edit: somebody will point out, alcohol may in fact kill slugs and snails, and the fermentation products in beer may in fact attract some, but I stand by what I said "a plate of beer in my garden is a gimmick, and not a cost-effective or efficient control method for snails and slugs."
Prove me wrong.
