Some of them appear to be able to have grown us in fish farms. :^) (borrowed from the “Tripods” TV series).
i still remember having the begeezus scared out of me as a tyke when I first watched the “day of the triffids”, but not too many years later i laughed at “salt water” being the big solution to killing them. Now, using “salt water” as a killing solution is a meme equivalent to witches melting in the rain.
https://en.wikipedia.org/wiki/The_Day_of_the_Triffids_%28film%29