The Night area is the second stage of Adventure Mode and the setting of the ten levels after the daytime levels in Plants vs. Zombies. It is exactly like the Day levels in layout except that it takes place in the nighttime; therefore, mushrooms stay awake and sun does not fall from the sky. Because of the lack of falling sun, it is much harder to defend the home without using mushrooms, and the player's sun producers have to be well-guarded. Sun-shrooms take the place of Sunflowers, and Scaredy-shrooms and Puff-shrooms take the place of Peashooters. Also, during this stage, graves will appear at the beginning of the level in random points on the half of the lawn farthest from the player's house. They cannot be planted on, and zombies surface from them during the final wave of a level. However, the graves can be removed by Grave Busters.
Nocturnal Plants, which mainly consists of mushrooms, are the key to Night levels due to the lack of sun and the fact that they generally require less sun than normal day time plants. The most important mushroom introduced in these levels is the Puff-shroom, which costs no sun at all. This is helpful because of the lack of sun. However, their short range means the player will eventually have to move on to better ranged mushrooms such as the Fume-shrooms and the Scaredy-shrooms, which are still both relatively cheap. The Sun-shroom, which costs less sun than the Sunflower, is also important. Sun-shrooms are vital as they are the only source of sun during the night (or Sunflowers if one was to decide to plant them). The other nocturnal plants introduced are Hypno-shrooms, Ice-shrooms, and Doom-shrooms.
An important trick for the Dancing Zombie is to use a Hypno-shroom on it as fast as possible to avoid non-hypnotized Backup Dancers. The hypnotized Dancing Zombie will summon hypnotized Backup Dancers, and this is extremely useful most of the time, albeit one should be careful not to hypnotize any Backup Dancers instead.
Plants vs. Zombies: Journey to the West exclusive (Archived content)(China only)
In addition to the pre-existing ten stages, there were three bonus stages exclusive to Plants vs. Zombies: Journey to the West. They all had an objective to complete. They required gems to be unlocked or specific fully grown plants in Zen Garden.
The song played in this area is called "Moongrains." While it also plays during the Night level, it is the only one that changes drastically during the huge waves of zombies, with a change in tune and more instruments.
In Survival: Night levels, even in between huge waves, the music also changes, while in regular levels after a huge wave has passed, the music reverts to the original.