Instant Kills are plants that will automatically explode/kill Zombies. Here are the list of instant kill plants

Name Recharge Time Priority Effect When?
Squash 30 Seconds High Squashes Zombie(s) There are 5-12 zombies near a Tall-nut/Wall-nut
Doom Shroom 50 Seconds High / Low Kills lots'a amount of Zombies There are lot's of Zombies
Cherry Bomb 50 Seconds Normal / Low Kills Zombies near the area 3x3 There are 12-25
Jalapeno 50 Seconds Normal - High Kills Zombies in a row There are 9 or more zombies in a lane