You'll get this achievement once get to level 4. The first few levels are like tutorials in which the first moves is teaching you the mechanics of the game. With that said, the first move of level 4 is forming a Flower Bomb (one color hex by six hexes of same color).
So the general idea is to play normally and you'll get it. Its virtually not missable.
EDIT: I accidentally typed level 5 when it was actually level 4. Thank you CayMack