3953. Kernel-pult

The Kernel-pult is an offensive lobbed-shot plant available in roof levels. It launches either small normal-damage kernel or bigger double-damage butter which temporarily immobilizes zombies (butter does not immobilize for a while). Like other lobbed-shot plants, the Kernel-pult fires at a rate of 1/2x, meaning that the light or normal damage is an average of the damage of the kernels and butter respectively. The Kernel-pult along with its kernels are the species of zea mays or maize.

Kernel-pult Seed packet in the iPad version
Two Kernel-pults next to each other horizontally can be upgraded into a Cob Cannon.

Kernel-pult is the eldest of the Pult brothers. Of the three of them, Kernel is the only one who consistently remembers the others' birthdays. He bugs them about it a little, too.

The Kernel-pult is best used in conjunction with other lobbed-shot plants (including other Kernel-pults), since it does not do a good amount of damage reliably.

They are also good when used in conjunction with Spikeweeds or Spikerocks since if they freeze the zombie while it is standing on the Spikeweed/Spikerock, the zombie will take large amounts of damage from the Spikeweed/Spikerock.
A Kernel-pult requires a bit of luck as the only reason why it can be useful is it has the chance to stun with butter while a kernel does hardly any damage and you would be better off with a Cabbage-pult.
This lobbed-shot plant is more useful than the Cabbage-pult overall, since it can stun, but if you want a better one, go for the Melon-pult. This plant is best used to increase the effective damage output of other plants; it can slow the zombies, giving your plants more time to deal damage. At the beginning of a level, plant a Cabbage-pult and then two Kernel-pults; when two or three are used in a single row the zombies get buttered much more frequently.

It is especially important during roof levels as the incline of the roof will upset the firing of peas, spores, etc. It can also hit Screen Door Zombie and Ladder Zombies over their doors and ladders, and Snorkel Zombies while they're underwater. It prioritizes Gargantuars over other zombies, making this a useful weapon against it.
It is best to use a combination of Cabbage-pults, Kernel-pults, then Melon-pults. It is a good idea to eventually replace Cabbage-pults with Melon-pults, and then with Winter Melons.