Grow-shroom

Grow-shroom is a plant which gets stonger each time it kills a zombie. It is the second new mushroom in Plants vs. Zombies 3: Dimensional Travels after the Heat-shroom. When it grows, its health and damage increases. It starts of very weak, but after killing enough zombies can be a fair defense.

Suburban Almanac Entry
Grow-shroom

Grow-shroom's power increases each time it kills a zombie.

Damage: Increasing

Toughness: Increasing

Range: Long

Grow-shroom used to think that one day, he'd grow to be very tall and kill the zombies of the sky better than even Cactus. Unfortunately, genetics made it so he got fatter each time he fights someone. At least he kept his dream of growing.

Cost: 75

Recharge: Fast

Strategy
Grow-shrooms are an especially good pair with Cacao Bean or Sugar-Cane, as those plants will speed it up, thus it'll kill zombies quicker. It starts off very weak, but should be able to kill a Browncoat Zombie on its own. However, if the next zombie is stronger, it is advised to add in a Wall-nut, to stay safe.

Plant Food
It grows enormous temporarily and shoots a gigantic spore doing massive damage in a 3x3 area. Once finished, it would've grown 2 stages more.

Trivia

 * It used to be much more similar to Cactus and would grow to shoot flying zombies. It used to fire slower, but do more damage, and pierce through all Balloons.