The absolute biggest annoyance in EA's newest expansion pack for The Sims 3, The Sims 3 Supernatural, is the fact that the concept of zombies roaming the neighborhood was not exactly executed the way EA presented it in their commercials. Not by a long shot.
Instead zombies become spawned during the full moon, and will show up wherever you are during this full moon.
The most annoying thing about this though, is that they will destroy
your garden, and you are left with absolutely nothing to do to stop them
from eating your plants until they are dead.
There are however a few ways around this, they will not always work
however, but it is the best advice I have to offer when it comes to
dealing with having zombies not kill your entire garden, rendering all
of your hard work useless.
The first method to keeping zombies away from your garden would be to
visit another lot during the full moon. Zombies only tend to spawn up
wherever your active Sim may be, so if you are not home during the full
moon, the likelihood of zombies spawning there are less.
The second method seems to be the most helpful way in dealing with zombies.
You can simply place a fence around your garden with a gate. Once you
have the gate placed on it, click the gate, and lock it to only allow
your family in. This will keep zombies from going in. The unfortunate
thing about this however is that zombies may sometimes spawn up in your
garden. It's a rare occurrence, but it can happen.
The final solution to ridding zombies from killing your garden is to
strategically place zombie pea shooters near the garden. The shooter is
available however only to those who purchased the limited edition
version of the game. What is unfortunate about the shooter though is
that it is not very effective at keeping zombies at bay, especially if
more than 1 spawns.