PopCap Games has just released a massive update to Plants vs. Zombies HD for iPad. Headlining the update is Zen Garden. In the zen garden you water and fertilize and spray your plants for bugs and as they grow, you get rewarded with tons of coins!

You’ll also discover two new nine-level game modes: Vasebreaker Endless and I, Zombie Endless. Try to survive all nine levels as you battle zombies hiding in vases, or change sides for a while and help zombies get past the plants. Four new mini-game challenges round out the gameplay updates with Slot Machine, Zombiquarium, Portal Combat, and Beghouled Twist.

In addition, 28 new achievements offer even more ways to prove your zombie-zapping prowess. Five unique Game Center leaderboards let you see where you rank. And new Coin Packs let you buy coins quickly and easily to get great new artillery and more. And finally, the zombies are multi-lingual. PopCap has added language support for French, Italian, German, and Spanish — now more players can enjoy all the action in their native language! Brains!