half my garden has been filled with B&Q bargains including some nice shrubs which have really filled out. occasionally i do see something reduced with no sings of life, but I've done well with the ones I've bought, as long as there's some sign of life, it's worth getting it and with a little TLC it'll soon be on its way.
I've also had trays of primroses (6 or more) for 30p, so if one or two don't make it, it's hardly a problem. last autumn i got a poorly looking clematis for 99p which has since perked up. Love B&Q!