Okay hear me out.
It wasn't a continuity error. It's the nature (pun not intended...) of plants - plants are powerful, but not quick. Plants are powerful, but not flashy. Plants are powerful, but not a single plant in isolation. The Demeter kids are not powerful like some other demigods. While children of Poseidon, for example, are rebellious and unpredictable like the sea, children of Demeter are patient and consistent like plants. They are not particularly powerful alone, but they are very powerful when they come together, like in the Battle of Manhattan.













