Iceberg Lettuce

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 are frozen for a short time, similar to the Ice-shroom from Plants vs. Zombies.

Suburban Almanac Entry
Iceberg Lettuce

Iceberg Lettuces freeze a zombie when stepped on.

Area: single

Range: touch

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.

Cost: 0

Recharge: sluggish

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, the Iceberg Lettuce cannot kill. 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 freeze the zombies, let the defenses weaken the zombies, and kill most of the zombies at once.

Trivia

 * Its name is based on the real life iceberg lettuce, also known as the crisphead.
 * 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 cost nothing, 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 Torchwood have bad synergy with this plant because their attacks will instantly thaw frozen zombies.