Window boxes for every direction?

[wejammin]

Help! I have a large bay window at the front of our Victorian terrace, with 3 sides. I have a small window box on the 2 sides and 2 small ones on the longer straight middle (each about 50cm long).
I've been trying for 3 years to get them to work but I've nearly given up. The problem is that the right hand side (furthest away from the door), gets lots of sun and shelter, and everything grows beautifully. The middle 2 get good sun but are exposed (we live on a very busy road too) so things do ok but not great. The box nearest the door is in pretty much constant shade and nothing grows well.
We're putting the house on the market soon and I need something easy and low maintenance that will work for all 3 boxes, any ideas?!

I would put some well established trailing ivy on the high sun and shade ends. Then trailing geraniums or pelargonium in the centre. Personally I think for house selling, just choose one colour and the same plant.for all central flowers If makes an an elegant impact.

Geraniums and ivy, deffo.
Not a gardener but these grow really well with no effort on your part! My geraniums from last year cost me £1 each and they have been in constant bloom since last May and I barely ever remember to even water them.

Ps meant to say I have some in sun and some in shade and all have survived!

Geraniums and Ivy it is then, thank you!