Topsy-Turvy Planter & Birdfeeder: very cute and inexpensive. Could forget bird feeder and plant herbs
The tire-swing planter that everyone wants! Hang a brightly painted aqua tire but instead of a swing, plant bright pink flowers inside the opening, love the cute gnome!
Move Over Hammocks: How to Make an Outdoor Bed Swing (would need to weatherize. The salt air would kill this otherwise)
Clever idea: an old window frame to hang flower pots from. There are loads of ideas for old window frames and even old doors.