It is based on the real meaning of embiggen, which is to make something larger, as gaining stats are the same as 'growing bigger' in this game. This word is often not used for formal communication.
Its appearance may be based on mint, a genus of plants in the family Lamiaceae.
Set - Rarity change: Basic - Uncommon → Super-Rare
Strategies
With
This superpower is a cheap trick which is used to boost both plants you do not want to lose to make them survive longer, or plants that already hit hard to make them even stronger. However, only Green Shadow and Captain Combustible can use this superpower and only once, so plan carefully.
If a powerful plant is further boosted, be prepared to play instant-kill cards like Locust Swarm or Rocket Science to destroy that plant, or use bouncing cards such as Pogo Zombie or Zombot Stomp to remove the boost.