Flowers

Flowers are a type of environment modifier that form a part of some levels in Plants vs. Zombies 2. The player must not let the zombies trample the flowers at all costs, because they will cause the loss of a level (or not get a star before the 1.7 update but the level will still continue) if the zombies manage to. Also before the said update, when a level is successfully completed without the flowers being trampled, the player would get a star. After the 1.7 update, they are present in some levels as an obligatory and additional objective in order to complete the level. The levels with this objective present state the rule "Don't let the zombies trample the flowers."

Ancient Egypt

 * Day 27

Pirate Seas

 * Day 15
 * Day 19
 * Day 23
 * Day 31

Wild West

 * Day 17
 * Day 21
 * Day 23
 * Day 27
 * Day 31

Frostbite Caves

 * Day 13

Lost City

 * Day 8
 * Day 24

Far Future

 * Day 33

Neon Mixtape Tour

 * Day 21

Jurassic Marsh

 * Day 7
 * Day 19
 * Day 35
 * Day 41

Modern Day

 * Day 30
 * Day 38

Strategies
On a level which the objective is not to trample the flowers, the player should plant more defensive plants and also instants, like Cherry Bomb. Plants that explode in a 3x3 area are useful because it can be a last-second approach of not letting the zombies trample the flowers. Grapeshot is a great choice in these kind of levels, as its explosion not only kills all the zombies in 3x3 area that are approaching the flowers, but also sends out projectiles to hurt and possibly kill more.

Defensive plants, especially high health ones like Tall-nut are vital to beat levels like this. The player could plant Tall-nut or other defensive plant at the right of the flowers, so the zombies would be blocked from trampling them. Chard Guard is also useful in levels like this, because although its health isn't high, you can use it to knock zombies back away from the flowers. But when the Chard Guard loses all its leaves, you will have to plant another Chard Guard in its place (or you could just put an Aloe behind it). Infi-nut can also prove useful in this level, as its force field can block all the zombies on each lane from trampling the flowers. However, once the force field is gone, the Infi-nut is just like any regular defensive plant, and the zombies will be able to advance to the flowers again. If the level is very fast-paced, use Primal Wall-nut to set up defenses quickly.

Slowing plants or stalling plants like Stallia, Iceberg Lettuce, or Winter Melon are useful in these kind of levels because the zombies will walk slower to the flowers, giving more time for the player to build up his/her defenses.

Avoid using plants that can bounce zombies back spaces, since it is possible for them to land on the flowers, instantly trampling them.

Trivia

 * If the player successfully completes a level with flowers, the blossoms will grow stems underneath them.
 * Flying zombies cannot trample the flowers.
 * Hypnotized zombies can trample flowers and cause the player to fail the objective and loss of a level. This is because even though they are hypnotized and therefore on the plants' side, they still count as zombies.
 * When trampled, the flowers turn yellow, wither, and disappear.
 * They seem to be a bit cross-eyed.
 * Despite that, when a zombie is close to a part of the flowers, all the flowers will look to the right.
 * Zombies blown over the flowers with Hurrikale, pulled over by plants such as Spikeweed, Spikerock, and Fume-shroom will not count as trampling them. This is to prevent the player from instantly losing very easily.
 * Zombies pushed or kicked by Primal Peashooter or raptors respectively also will not count as trampling the flowers.
 * However, zombies pushed by Spikeweed or Spikerock when they are planted before the flowers, Chomper, Coconut Cannon for all zombies that bypass the flower line (i.e. Swashbuckler Zombie) while their Plant Food effects are active, they count as trampling the flowers and cause the player to lose the level.
 * If the flowers are located in the middle of a tile, the player can plant on the flowers without the flowers being hurt.
 * All-Star Zombies used to be able to jump over flowers if timed properly.
 * Like any other normal objectives from version 1.7 and above, when the player lets a zombie trample the flowers, a brain still appears if the player loses.
 * However, the losing message will say "Don't let the zombies trample the flowers" in green text instead and does not uses the font for the standard game over message (THE ZOMBIES ATE YOUR BRAINS!).
 * In levels with these, when only Prospector Zombies are left in a level and it is a final wave, they will not die so that they can be allowed to trample the flowers.
 * Raptors in Jurassic Marsh cannot trample the flowers.