You have to reach Lv. 36 (you'll need to get a total of at least 97,000 exp).
Level 36
The one in zombie farm
At level 21
you actually have to pass the hole game first
You have to eat them like this.NUM NUM NUM
There are 5 different kinds. You'll unlock them on level 4, 8, 15, and 25.
Level up
you need a blue gravestone.
plant alot it depends on what level ur at
you buy it with real money. to buy it you go on choose your farmer and tap the king zombie head and it will take you to the app store so you can but it.
You have to find 3 Rusty Fragments, found randomly after invasions.
Yes. Level 34 Plus -- place Zombie patch within Hazard fences (along with anything else you want to protect) to prevent Aliens from taking them away.