The garden weddings here are the ones worth planning carefully. An outdoor ceremony on a lawn is not a hard install, but a wall on grass needs a level bearing and ballast, and a lawn after a wet week needs boards under the feet. We would rather bring them and not need them. Where the ceremony is outside and the reception is in a panelled room, the wall almost always belongs indoors, where it holds the room the dancing happens in.
Princeton's older reception rooms have real architecture — panelling, mouldings, fireplaces — and a flower wall can either complement that or bury it. Our honest advice in those rooms is a denser, tighter wall in a restrained palette rather than a wide riot of colour, because the room is already doing half the work.