You can't play Zombie Farm on Facebook yet, but I've heard that they're working on making it possible.
yes
Nothing
To get that farm banner on Zombie Farm, you've got to win an invasion and have some luck with the loot you get.
You cant. Thats in Plants vs. zombies, not zombie farm.
you cant .....
shot it with an arrow
You buy it from the store.
surround the zombie with plants
Combine flower zombie with flower zombie.
you get a zombutterfly
That is when you harvest a zombie that is dead