I love the varying heights of the planters that Katy just posted on her blog. My mother has similar tall urn-like planters at her door and it is gorgeous!
I love the planter box on the side of this little patio (from Design*Sponge). I want to put a raised box with tall flowers in it to act as a big green and floral wall.
I just bought this Campanula flower at the local greenhouse. It's very tall and blooming happily in my front yard! If it makes it through the winter I hope to get many more next year!
Mark's mom recently introduced me to Bachelor Buttons. They are the most vibrant blue flower with a very full bloom. I'd love to grow these tall flowers in the raised beds around the patio.