Porcelain Vase Weed is a SpawnableWeed variant in Plants vs. Zombies: Garden Warfare 2. Like the Vase Weed, he is a standard Weed that supposedly has grown upside-down into the Vase he was planted into. The main difference is that the Vase in question is made out of porcelain, making him tougher than the Vase Weed. He is the plant counterpart of the Outhouse Zombie.
His melee attack while in the vase is named the Weed Bash which deals 25 damage and his melee attack when out of the vase is called the Weed Whip which deals 15 damage. His long range attack is called Seed Spit which deals 25 damage.
Porcelain Vase Weed's stickerbook description in Garden Warfare 2
Trivia
He has a very similar description to Vase Weed in that both Weeds have supposedly grown upside-down into the vases they were planted into.
This can actually happen in real life (upside-down plants), as evidenced by experiments conducted in zero-gravity aboard the ISS (the International Space Station).