Go ahead and “go to seed”
Laura Young
ECB Publishing, Inc.
Since the mid 1800s or so, Americans have used the phrase “gone to seed” figuratively as a way to disparage something or someone that has, according to the Collins English Dictionary, “become much less attractive, healthy or efficient.” Ye old faithful Miriam-Webster Dictionary gives the idiom even more negative connotations of “dilapidated” or “neglected.”
I've used the phrasing myself more than a time or two, for example to describe a “se