There's grass in your basket...
On our recent trip through the Alsace-Lorraine area of France, along the German border, every town we visited had gorgeous planted baskets along bridges, canals and on light posts, not to mention the ubiquitous window boxes and street side planters.
Other than geraniums, the most ever-present plant we saw in these, were grasses. I've not seen too many basket-planted grasses here in the U.S. The photos here show the grass baskets very late in their season, that's why some look kinda' sloppy, but I'm sure throughout the growing season, they look smashing.
I may try more of this next year. I'm happy with any grass that doesn't have to be mowed. The grasses provide the the thriller in the French version of thriller / spiller / filler -- écit à suspense / flaque / remplisseur. Doesn't really roll off the tongue now, does it?