I just bought a hardy hibiscus (marsh mallow) wrongly labeled as a red one (Lord Baltimore?) but is a medium pink. The person working at the nursery said it's a perennial hibiscus and will come back next year.

I'm in NJ, zone 6 and it does get below freezing in the winter.

Should I believe her or should I bring it indoors over the winter?

Also, how long does each bloom last?

Thanks so much and any other info. you have for its' care would be great. I'm used to daylilies and other perennials but this is my first hibiscus.

Here is a pic of its' first bloom today.