More substantial than an arbor but less confining than a gazebo, a pergola may be as simple as an overhead structure attached to the back of your house to cover a deck: www.bhg.com/...
Prop pillows against the arms and a cushion on the seat to turn a backless bench into a daybed. Similar to shown: Generous 4-foot Backless Teak Garden Bench with Scrolled Arms, about $400; Plow & Hearth
Backyard inspiration (I like the idea of attaching clay pot hooks to this wall panel and hanging orchids from it; the storage bench could double as a place to keep gardening supplies and a plant stand for more orchids - from IKEA)
Real Wood Products�18-in H x 26-in W x 26-in D Oak Wood Outdoor Planter. With soil and tomato plants