Iceberg Lettuce

The Iceberg Lettuce is a plant in Plants vs. Zombies 2: It's About Time. It costs 0 sun and freezes any zombie that steps on it for 10 seconds. It is based on the real life iceberg lettuce, also known as the crisphead. If a frozen zombie is attacked by a fiery plant like Snapdragon, the Zombie will unfreeze and continue to move on.

Plant Food Upgrade
When Plant Food is used, all zombies will freeze for 10 seconds, similar to the Ice-shroom from Plants vs. Zombies. However, the Iceberg Lettuce will not disappear.

Almanac Entry
Sun cost: 0

AREA: Single

RANGE: Touch

RECHARGE: Sluggish

Iceberg Lettuces freeze a zombie when stepped on.

Special: explodes, temporarily freezing a zombie

Don't get lost staring into Iceberg's adorably cute eyes. If you do, it will be your last step... but only if you're a zombie.

Strategies
The Iceberg Lettuce is a basic plant to freeze zombies. Using it to freeze a Zombie early on can increase the amount of time to plant Sunflowers. However, unlike other one-use plants or freezing plants, the Iceberg Lettuce cannot damage a zombie. This makes it a zombie delayer, rather than a zombie killer. It's also ideal for zombies too tough to kill with the defenses, such as a Buckethead Zombie in a lane with the only attacking plant - a Peashooter. The Plant Food upgrade freezes every zombie, and is especially useful during huge waves, but a waste of Plant Food against lone zombies. Pairing it up with another usage of Plant Food on a plant which hits all zombies, such as Cabbage-pult, can damage the zombies, let the defenses weaken the zombies, and kill most of the zombies at once. Iceberg Lettuce can freeze a whole line of Camel Zombies. It is also useful against Explorer Zombies, since when it is stepped on by a Explorer Zombie, the Explorer Zombie not only freezes, but also has its torch burnt out.

In the Chinese version of the game, whenever it been in second level, it will start shooting projectiles wich can kill a normal zombie. But it will shoot 4 tiles in front of it. So you can use Snapdragon on it, it can be really useful. It is also useful in start of the level, beside it is free and can kill normal zombie at once.

Trivia

 * Iceberg Lettuce cannot freeze the Zombot Sphinx-inator, but slows it down rather.
 * If a missile from the Zombot Sphinx-inator hits it, it will disappear, but will still slow down the Zombot somehow.
 * If the player uses Plant Food on it, it will freeze every zombie on screen. However, instead of disappearing like Ice-shroom, it will stay on the lawn. It can be a good strategy to protect it and to use Plant Food on it where there are too many zombies.
 * But unlike Ice-shroom, when zombies are no longer be frozen, they aren't slow (be chilled), instead, they become normal.
 * Since the 1.9 update, it will detect the zombie if it is buttered, frozen or stunned, if it is a machine and is disabled by E.M.Peach, instead of freezing it, it will stay inactive until the zombie gets back to its normal state, then it will freeze it.
 * This is one of the three plants in the series that never cost sun, the other two being the Puff-shroom and Sea-shroom.
 * Snapdragons and Torchwoods do not work well with this plant because their attacks will instantly thaw frozen zombies.
 * In Plants vs. Zombies: Official Guide to Protecting Your Brains, the Iceberg Lettuce is referred to as just "Iceberg".
 * While it is using Plant Food, its costume will disappear.
 * This also happens on Snapdragon, Bonk Choy, Spikeweed, Spikerock and possibly Repeater (cause to the helm).
 * It seems to have the same costume as a Peashooter during Christmas.
 * Iceberg Lettuce cannot be burned by lasers utilized by Gargantuar Primes.
 * In Plants vs. Zombies Online, Iceberg Lettuce can stop the Fireball of the Sphinx.
 * There is a glitch when a zombie has nearly passed over a grave, and you put an Iceberg Lettuce right in front of the grave, the plant would try to freeze it but instead it will disappear.
 * Also, the freezing effect of the Iceberg Lettuce can be useless towards rapidly moving and running zombies, such as Pharaoh Zombie, after destroying his sarcophagus. The plant simply won't catch the zombie and will disappear.
 * It's mentioned in Lettuce Lark flipdeck.
 * It can shoot in the Chinese Version of Plants vs. Zombies 2: It's About Time.