Having an outdoor Halloween is simply best because the yard has spooky feeling in night and you can transform it to a haunted one with apt decoration. Here are some outdoor Halloween decoration ideas.
First you need to select a theme for the festival which can be mystical as well as spooky. You can revamp your outdoor settee to graveyard, occult laboratory or any other supernatural place. Once you decide the theme you need to work on the decoration. You can decide the simple or complex ones. For example a moving ghost would be complex to create but give a thrill to your friends. You can also go with simple scarecrows or other decorations.
Search market in the Halloween season and you will find some amazing props specially to be used in outdoor setting or yard. There are some rubber sculptures of zombies; ghouls etc that give a realistic look to the set up. You can find some glowing human sculls in nearby market along with chopped and blood stained body parts. You can get your outdoor Halloween decoration ideas from movies and videos. If you are low on creativity there are some ready to use Halloween kits that come with instructions to install the set in outdoors.