Undeadnettle

Undeadnettle is a plant that has the ability to revive plants.

Usage
Once you select the Undeadnettle seed packet, you will notice that there would be highlights on the square your arrow is hovering on. The highlights represent the latest plant that died on the square. Once planted, you will notice the Undeadnettle playing its flower like a flute. After 5 seconds, the Undeadnettle will disappear and the latest plant to die on the square grows back from the ground. Unlike newly planted ones, revived plants will have half of its original health.

Strategy
The Undeadnettle is very useful to restore valuable plants, so choose carefully. It is advised to revive plants more expensive than the Undeadnettle(220 Sun+) as reviving cheap plants result in waste of sun, unless you are just too lazy to wait for the killed plant's recharge.

Trivia

 * The plant Undeadnettle represents is actually Deadnettle, also known as Lamium.
 * The name comes from its origin plant's name, Deadnettle, adding "Un" in front hence its ability to revive plants, making them "undead"