What type of music do flowers like best?

"What type of music do flowers like best?" was Rodrick's science project when he was in middle school. At first Rodrick put the flowers in different places where different type of music were played. Within a week all the flowers died, and Rodrick thought the music killed them. But Susan told him that the reason the plants died was because he never watered them.

Trivia

 * The four genres used were "classical", "nursery", "lame pop", and "rock". Knowing Rodrick's personality, one can imply that "lame pop" is Rodrick's name for non-rock modern music.
 * It is also possible that Rodrick got the classical music from Frank and nursery music from Manny.

Appearances

 * Diary of a Wimpy Kid: Hard Luck (First and only appearance)