Tulips are hardy. They don't like warm winters. Their hardiness has nothing to do with their ability to return.

Whether Holland Queen will naturalize depends upon to which group it belongs. I didn't see that given at the link. Old Darwins are the most likely to multiply.

Found a link that labels it as a class 3 - Triumphs.

Here is a link that might be useful: http://www.fluwel.com/holland-queen/49

Thanks iris_gal for the reply. When I used the term 'hardiness' in my post I was trying to refer to its ability to be perennial. Thanks for the link.