Sweet Potato

Sweet Potato is a premium plant that was released in the 3.0.1 update of Plants vs. Zombies 2: It's About Time. It attracts zombies from other lanes to its lane when zombies are nearing a three-by-three area around it. Like Ghost Pepper and Homing Thistle, it costs 109 gems for purchase. It has an equivalent health of Wall-nut's.

Plant Food Upgrade
When given Plant Food, it fully heals itself and attracts zombies in a greater area, even ones that are behind it. They will walk backward to it.

Almanac entry
TOUGHNESS: High

RECHARGE: Sluggish

Sweet Potatoes attract zombies from other lanes when they are close by.

Sweet Potato really is as sweet as she looks. Her favorite animal is the unicorn. Her favorite color is (and this is a direct quote) "all the colors in the rainbow." When she writes the letter "i", she draws a little heart where the dot belongs. Frankly, if it were anyone else, this amount of syrup would be sickening. But on her, well, it just seems right.

Strategies
Sweet Potato gives the player ample time to set up his or her defense, as it can attract zombies into a well-guarded lane. It's especially useful for grouping enemies from three lanes together into a position where they are attacked all at once, such as by Banana Launchers, Winter Melons, Kernel-pults, or even Potato Mines placed behind it. Snapdragons are also effective as up to eight can be arranged around the Sweet Potato (including two flanking it) to pummel all the zombies amassed together, destroying them quickly.

Since the Sweet Potato is also in the same defensive class such as Wall-nuts, they can be healed by Wall-nut First Aid, and their Plant Food ability will fully heal them in addition to drawing in zombies, including some behind it (though Plant Food will not buff their defense, unlike with other defensive plants).

Its main drawback is its high sun cost, which can be problematic when sun is short supply or when around enemies with instant-kill abilities such as Fisherman Zombies. A mob of zombies brought in from other lanes can also whittle a Sweet Potato away very quickly if they are not dealt with. A few zombies are also immune to being attracted by it, such as Jetpack Zombies and Surfer Zombies.

Arming your lanes with Homing Thistles may also be a good idea until the player's sun budget permits them to purchase a Sweet Potato. Placing a Sweet Potato on the second and fourth row would create a effective defense with the least amount of Sweet Potatoes possible.

Trivia

 * This and Threepeater are the only plants in the game with a sun cost of 300.
 * It squeaks in the Almanac, the seed selection screen, and during the gameplay.
 * The brown area on its body appears to be the brown peel of the real life sweet potato.
 * It is the opposite of Garlic, as Garlic repels zombies while Sweet Potato attracts them.
 * It is the third potato plant in the whole series, the others being Potato Mine and Imitater.
 * Sweet Potato is not actually a potato. In New Zealand it is called Kūmara, which is the sister plant to the Potato.
 * Ironically, most sweet potatoes are actually poisonous once it grows the sprout. Furthermore, Sweet Potatoes have a heart shaped leaf on their primary plant, and hearts come off the Sweet Potato when using Plant Food.
 * Like Ghost Pepper, Sweet Potato is a limited time premium plant that is only available during a certain month.
 * Jetpack Zombie, Disco Jetpack Zombie, Surfer Zombie and Barrel Roller Zombie cannot be attracted by this plant.
 * Sweet Potato can make a Shield Zombie switch lanes with its shield activated, but it will detach from its shield and the shield will be unable to switch lanes.
 * This is the most expensive premium plant with sun-cost, being 300.
 * In any situation where a zombie would repeatedly go back and forth between lanes due to more than one Sweet Potato trying to attract a zombie, the zombie will ignore Sweet Potatoes altogether. It will only be attracted to a Sweet Potato once when the other(s) is/are gone.
 * Sweet Potatoes that use their Plant Food Upgrade have priority, and therefore, the zombies will ignore the previously said statement and go to the one which was fed Plant Food only if the zombie is in its range.
 * If a zombie is at the back or at the bottom of Sweet Potato while using Plant Food, it will attract the zombie behind and it will make it eat it backwards.
 * There's a glitch after feeding it with Plant Food while planted on a Lily Pad on water: Any zombies that move backwards to eat the Sweet Potato will actually eat the Lily Pad, losing the Sweet Potato.