This article is about content available solely in the People's Republic of China.
The greenhouse is a building in Plants vs. Zombies Online. It is used to upgrade plants, similarly to the upgrade system in the Chinese version of Plants vs. Zombies 2 . To upgrade plants, the player has to complete certain objectives within the game, as well as have a certain battle score, which depends on what plant is being upgraded. It is unlocked when the player reaches level 5.
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