Explode-o-nut

The Explode-o-nut is a red version of a Wall-nut found only in level 1-5, Wall-nut Bowling, Wall-nut Bowling 2 and Co-op Bowling that explode with a range of a Cherry Bomb. They do not cost any Sun, as the Wall-nut Bowling games are conveyor-belt levels. If you blow up more than five, it will still not award you the "Roll Some Heads" achievement. They do not blow up if they do not hit a Zombie.

Strategy
See Wall-nut Bowling and Wall-nut Bowling 2 for more strategies.

Just save them up for waves of Zombies. They will blow up the instant they touch a zombie. They are powerful enough to immediately destroy any zombie (except the Gargantuar), making them great opponents for tougher zombies like the Buckethead Zombie, Screen Door Zombie or Gargantuar.

To make full use of the explosion area, instead of rolling them at a group of Zombies, wait until the group of zombies crosses the line far enough and plant one in the middle of them. Also roll them on the second and fourth row when a flat wave of zombies comes, as they blow up large amounts of Zombies on the screen (excluding Gargantuars).

Trivia

 * The Explode-o-nut, the Giant Wall-nut, and the Sprout are the only plants that don't have an Almanac Entry.
 * The Explode-o-nut is the only explosive plant that can't harm zombies that are above the ground (Pole Vaulting Zombies), because other explosives can hit zombies while jumping or Balloon Zombies.
 * Through hacking, it is possible to place the Explode-o-nut on any level, but the Explode-o-nut does only what a regular Wall-nut would do.
 * Through the User File Editor, the Explode-o-nut can be placed in the Zen Garden.
 * Explode-o-nut and Cherry Bomb are the only plants that explode with a POWIE! onomatopoeia.