Tallroot

Tallroot is a strageic plant that first appeared in Plants vs Zombies 2. Like the Pumpkin, it can be placed on top of an existing plant or can have a plant placed in its spot. The main function of the Tallroot is to allow a second plant to planted in a given spot, essentially providing a second layer of usable space.

Suburban Almanac Entry
Tallroot

This plant allows a second layer of plants to be placed.

Toughness: High

Special: Allows more than one plant in a given space

"How's the weather up there?" other plants ask. "Just fine!" Tallroot tells them. They don't bother him. Because while they're being eaten alive, he's enjoying the fresh air up above it all.

Cost: 300

Recharge: slow

Overview
The Tallroot allows a second plant to be placed above a currently existing plant, like a scaffold. However, a Flower Pot (for land plants) or Water Bucket (for water plants) is needed. Peashooters (except the Pod Launcher), and offensive mushrooms can only hit Balloon Zombies from this height, though lobbing plants and non-offensive plants function normally. It has the same strength as a Wall-nut, but due to its price should not be used only for protection.