Craig, I have never tried to grow roses from Trader Joes, so can't help you there. If you get no responses, I would check at the store you got it from. Maybe it's just because the T.J.'s I go to has a great crew, but they will do whatever they can to answer your questions. Very responsive. They may also have a web site. I have not checked, but it wouldn't hurt to try. As for the other goodies you came home with, it is a hazard.
So many delicious things there. If Joes is a new place for you, check out the frozen veggies off season. They are amazingly good. They also have an excellent take back policy. I don't do it very often, but they make it easy. It's my favorite place to shop for quality. and no, I do not own any part of the company.