Good Morning

Strategy
Time to restart Adventure Mode! Crazy Dave's going to put in three plants, so ignore the two, except he placed a Coffee Bean in your slot. Pick, Sun-shroom, Puff-shroom, Fume-shroom, Gloom-Shroom and Hypno-shroom to beat it. To get it, only use Mushrooms and Coffee Beans. DO NOT plant any other plant or you won't get this. It's a very easy achievement to get. Put in three Sun-shrooms and wake them up and later, if you have enough sun, you can buy two Gloom-shrooms. Puff-shrooms can help slow down the zombies (do not wake them up as this wastes your sun). Then, when a Flagman comes, block the leader with a Puff-shroom and when they kill the zombies, you'll get an achievement.

Also, this achievement will still count if you complete ZomBotany with only Mushrooms and Coffee Beans.
 * Note: Completing a Pool or Roof level using only mushrooms and Coffee Beans does not count towards this Achievement.