The grass on his lawn had grown as long as mine.
Gatsby would always have his landscaping service take care of Nick’s grass as well as his own. To Nick “the grass was always greener on the other side”: his neighbor’s extravagant house was always filled with people, music, laughter, and drink, whereas only a handful of people ever visited Nick. Now that Gatsby is dead, his grass is the same height as Nick’s.
Symbolism abounds: his cover of being “old money” has been blown, and he is now just the same as Nick on the social ladder, or even lower. The grass on the other side is no longer “greener”; it’s just as bad, or worse.
To help improve the meaning of these lyrics, visit “The Great Gatsby (Chapter IX)” by F. Scott Fitzgerald and leave a comment on the lyrics box