Don't Pea in the Pool

Strategy
This is a very very simple achievement to unlock. There is little point in trying it until you beat Adventure Mode, but once you do all that is necessary is to replace Peashooters with Cabbage-pults, Kernel-pults, Cacti and/or Melon-pults. Cattails are also good to use since they can attack every lane. Chompers can work too, since they're a replacement and can be used for this Achievement before finishing Adventure Mode. If you have a Coffee Bean you can use Scaredy-shrooms, Puff-shrooms, Sea-shrooms (if you want to plant in the water), or Fume-shrooms. It is possible to get this, & the achievement Pool's Closed, by using area of effect plants such as Starfruit. Overall, you should try for this achievement on Level 3-1, on after you completed Adventure Mode at least once. You can still earn the achievement without finishing adventure mode on level 3-1, by using Chompers, Lily Pads and Wall-nuts, since they protect the Chomper, and there is no zombie that is a threat on the level.


 * Note: Completing a Fog level without using any Peashooting Plants will not unlock this Achievement because its not day (nor "No Fungus Among Us", if you don't use mushrooms). Also, completing ZomBotany 2, Last Stand, or other Pool Mini-games doesn't unlock it, either.

Trivia

 * Don't Pea in the Pool is a reference to the rule "Don't pee in the pool".