I now have my vegetable garden fenced off with a locked gate, I got a couple of peashooters spread out over the garden to take care of any zombies, sometimes I have to tell them to shoot other times they do by themselves, then I have a fairy that is always stocked up on cures and she usually manages to help a few zombies as well, working on her LTW.
Those peashooters are great! I had 2 kids sitting outside playing chess while a zombie stumbled towards them, got pelted by the peashooter, fell down, had a nap and then left, the kids didn't even notice!