Board Thread:Plants vs. Zombies/@comment-24447129-20140125183351/@comment-24170389-20140125195221

Fast ways:

Make 20 flags Survival: Endless

Slow ways:

Make Adventure Mode again and again

Tip:

Do not sell any plant until ALL Zen Gardens are full

Trivia:

There are 3 Zen Gardens, the other 2 are for Mushrooms and Aquatic Plants, since you can't grow them on the main one