Board Thread:Plants vs. Zombies 2: It's About Time/@comment-25832612-20150409040610/@comment-24507085-20150412230050

Dimetrodongold wrote: Maybe it's just me, but beating all the gave me more than 109 gems. I have currently have purchased Homing Thistle, Ghost Pepper and Dandelion. Most of the gems I have obtained are just from beating the normal levels, earning achievements and playing the Endless Zones. This.

You don't have actually "grind", for only play the game you can earn gems. Play the Endless Zones is fun and gives you a lot of gems and sprouts.