Grass apocalypse

Whe zombies start chewing on your newly planted petunias, the first thing you do is take them down right? The second thing you worry about is: Why are they eating my flowers? Aren't zombies supposed to eat.. Humans?
The last thing is: what am I supposed to do now? Do I stay? Do I safe the plants? Do i fight the zombies?
That choise was laid before Lialore, and she choose the plants, because, how are going to breathe without them?