Since you are in a cold zone - those roses in a bouquet might be florist roses grown in greenhouse, and not hardy for outside winter. Here in the rose park, zone 5a, of over 1,000 bushes - the hardy hybrid teas are: Chicago Peace, Heirloom, Tropicana, Double Delight, Midas Touch, Hot Cocoa, and Chysler Imperial. Walmart, Aldi, Kmart, and Menards have those bareroots for under $5.

Karl Bapst, zone 5a Indiana, once listed all the hybrid teas hardy in zone 5a. If you google "Karl Bapst and hardy roses, it will show up the list."

It wouldn't hurt to give it a try.

Gently scrap off some of the green skin at the bottom of the canes and dip them in a rooting hormone of some type. Then stick them in cups filled with potting or stater soil. I like to use the clear plastic drinking cups so you can see when they get roots. Make sure you poke a hole in the bottom of the cups for drainage. Put them outside in morning sun or dappled sunlight. Keep the soil damp but not soggy and wait. That's the hard part, lol. Good luck!

I was about to go back, and say "it doesn't hurt to try rooting a hardy rose", but Seil already did. Thanks, Seil, for being supportive.

Below is the link to Karl Bapst's instructions on rooting, you'll see it when you scroll down the bottom of the page.

Here is a link that might be useful: Karl Bapst on rooting rose cuttings

Thanks for the advice. I've got my rootone, cups (clear) for growing and covering, and most importantly, roses. I'm going to start the grand experiment tonight. I could get these same roses at home depot, but where's the fun in that...lol? I'd much rather be able to make this work and say that my roses came from floral bouquets. Wish me luck!

Fortune favors the prepared. . . Good luck!

Dan,
I do it all the time. At least a few Saturday mornings a year I go out to the whoelsae florist at metro airport and pick up some interesting florist roses to root. I just try and make sure they are not patented. Here is a pic of Papaya, which I rooted a few years ago;
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Here is Latin Lady, which although it rooted really easily, just was not strong enough to last a really bad Michigan winter;
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If you look under the thread on the pop bottle method, you'll see some advice I lent on rooting these. You can always go out to HMFR and look up my gardens under my lastname (Gleason) where I have my cell phone number if you want extended instructions. Also, if you are in the SE MI area, stop by and I'll walk you through the process.