Garden Centres are not your normal haunt for decent beers although the one within a mile from my house has a small range including Cusqueña Malta from Peru, but Dobbies has a more than respectable choice of bottled beer.
Being a Scottish company the beer is all from north of the border, with examples from Arran, Atlas, Belhaven, Black Isle, Bridge Of Allan, Broughton, Cairngorm, Caledonian, Fyne, Hebridean, Inveralmond, Islay, Isle Of Skye, Orkney, Traquair, Valhalla and Williams Bros. Sadly there is no BrewDog, but hopefully in time there may be. I have not seen such a vast range of Scottish beers under one roof before and added to the fact that the food hall has some great produce including local free range meat,a visit is well worth while.
Although mostly in Scotland there are a fair few branches in England so hopefully you will be able to show support to a store new you.