This has to do with with the mixture of honeys and apples being associated with Vermont in Japan, though I'm not quite sure how wildly known that is or why.
It's because there was a book called "Folk Medicine: A Vermont Doctor's Guide to Good Health" that kicked off a health fad called the "Vermont health system" in Japan. It included drinking apple cider vinegar and honey. The curry then appropriated the name for its health connotations.
If you're celebrating Vermont cheese, you need to get out to Wisconsin. I'm a Minnesotan so it does pain me to say that they're better than us at something, but Wisconsin cheese lives up to the hype.
Fun fact: In Super Troopers, there were several jokes about Thorny being Arabian, Mexican, etc because of his personal life growing up in Vermont and people were uh uncertain.
Oddly enough, they don’t seem to sell this in the EU or UK (though some Asian groceries near universities have a mix in similarly coloured packaging made for the Chinese market by House’s PRC subsidiary), though they sell other House and S&B curry mixes. I wonder if Vermont Curry might contain an ingredient that’s banned in the EU or something.