To unlock The Post Office Lot, you need to collect Water Bottle and pay 1000 Coins to reclaim the Lot. Upon reclaiming the land, you need to fight agains the new DJ Zom-B on the waste land. After winning the battle, you get Snow Pea as a new Plant.
Plants vs Zombies Adventures The Post Office Lot – All stats
All the stat of Plants vs Zombies Adventures The Post Office Lot including new Plant and new Zombies to unlock as well as how to unlock or reclaim the Lot are shown in the table below:
Plants vs Zombies Adventures The Post Office Lot stats
||The Post Office Lot
||Available after collecting Water Bottle and paying 1000 Coins
For a complete guide on PvZ Adventures Beta, go here.