Hi Rachael
A lot you can do with full sun. My neighbor planted carpet juniper on my side of his driveway and I hated it, was a real bugger to get out too. It is great for erosion control if you like the look of it though.
I would suggest daylily too, forms nice clumps and you get flowers.
Seeds would be most economical if you are patient enough for the perennials to get going. You can also fill in with annuals in between.
There is always someone selling daylilies in the classified here at ATP
http://garden.org/forums/view/...
check craigslist too, sometimes people will give stuff away for free if you are willing to dig it up.
