any shrub that gets more than 10inches or so and more high will die in that trough - there's not enough depth for anything to grow successfully, other than annuals, perhaps. If the area gets some sun, you could grow marguerite daisies, probably 2 bushes in it, for the summer, if not sunny, then upright fuchsias, but if you want something like a shrub, you need to replace the trough with something that's at least a foot deep and 12 inches wide.