If you are every looking for a good outdoor backdrop, believe it or not, a plain old garage door is a great tool.

First of all, the rectangular shape (composition) makes for a great frame around your subject.
Secondly, most garage doors have clean textures which are not distracting.
Third, the driveway allows you to move your subjects closer or further away from the camera. This is especially important when shooting groups. It allows you to control their relative size without worrying about them stepping in flowers or what not.
For at least half of the day (sometimes more) the garage will be in complete shade.