Tall-nut

The Tall-nut is a tougher version of the Wall-nut. It lasts approximately 144 normal zombie bites (or about 80 seconds), and changes appearances at 48 and 96 bites before being swallowed at 144 chomps. Tall-nuts also prevent Pole Vaulting Zombies, Dolphin Rider Zombies, and Pogo Zombies from jumping, although Ladder Zombies can still climb over them, and Gargantuars and Zombonis treat them like normal plants and can squash them.

Suburban Almanac Entry
Tall-nut

Tall-nuts are heavy-duty wall plants that can't be vaulted over.

Toughness: very high

Special: can't be vaulted or jumped over

People wonder if there's a rivalry between Wall-nut and Tall-nut. Tall-nut laughs a rich baritone laugh. "How could there be anything between us? We are brothers. If you knew what Wall-nut has done for me..." Tall-nut's voice trails off and he smiles knowingly.

Cost: 125

Recharge: slow

Strategy
Don't depend solely on Tall-nuts unless you also have an Imitater Tall-nut, as the slow recharge time will often leave you without any defenses. They work especially well in conjunction with Spikeweed and Spikerocks, so many strategies employ the combo as a first line of defense on the far right. It is recommended that you purchase Wall-nut First Aid to be able to place replacement Tall-nuts on top of damaged ones without having to dig them up first. Tall-nuts should also be used in the pool to prevent Dolphin Rider Zombies from breaching your defenses.

These are a good choice for the Mini-game Pogo Party, and the Imitater version should be also used.

Trivia

 * For some reason when a Gloom-shroom is planted behind it (in the same row or the rows above and below) the Gloom-shroom will not attack zombies in front of it unless a Dolphin Rider Zombie, Pole Vaulting Zombie, or Pogo Zombie tries to jump over the Tall-nut. This may be because the Tall-nut is large enough that the zombies cannot enter the square, so they cannot get inside the Gloom-shroom's range.
 * This will not happen if the Gloom-shroom is planted in the same column as the Tall-nut.
 * Before a Tall-nut is completely eaten it will shed a single tear.