Iceberg Lettuce

The Iceberg Lettuce is a plant in Plants vs. Zombies 2: It's About Time. It costs 0 sun and freezes a zombie that steps on it for approximately 10 seconds.

Plant Food Upgrade
If Plant Food is used, all zombies will freeze for a short time, similar to the Ice-shroom from Plants vs. Zombies. The Iceberg Lettuce won't disappear however.

Suburban Almanac Entry
Iceberg Lettuces freeze a zombie when stepped on.

AREA: Single

RANGE: Touch

RECHARGE: Sluggish

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 Peashooter will continue to shoot even after the Iceberg Lettuce has stopped the Buckethead). 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 freeze the zombies, let the defenses weaken the zombies, and kill most of the zombies at once. Iceberg Lettuce can also freeze a whole line of Camel Zombies.

Trivia

 * Its name is based on the real life iceberg lettuce, also known as the crisphead.
 * Also, it could possibly be a lettuce. If so, then he is the third cabbage in the series (others being Cabbage-pult and Bonk Choy).
 * Iceberg Lettuce cannot freeze the Zombot Sphinx-inator, but will slow it down.
 * If you use 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.
 * This is one of the four plants in the series that do not cost any sun, the other three being the Puff-shroom and Sea-shroom in Plants vs. Zombies, and the Grave Buster in Plants vs. Zombies 2: It's About Time.
 * 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".
 * When it is using Plant Food, its costume will disappear.
 * It seems to have the same same costume as a Peashooter during Christmas.