Any flower experts around?

Any flower experts around?

This is the second time this has happened, and I'm starting to wonder if it's me, a really strange coincidence, or what.

I bought a bouquet of flowers earlier today, and there was a little hydrangea in it. I put the bouquet in water with a small amount of the powdered food stuff that came with it. I looked back maybe fifteen minutes later and the rest of the bouquet was fine, but the hydrangea was completely wilted! I've tried taking it out, trimming the stem and putting it in plain water, but it hasn't perked back up. This happened once before when I had a larger hydrangea, but I thought it was just that brand of food stuff that wasn't good... I guess not!

Has anyone else noticed this? Am I just crazy? I don't know very much about flowers so I'm wondering if this is something I should always bear in mind when buying them.

Thanks! :o)

Addendum for future reference: The (boiling) hot water method really does work, it's amazing. I recut the stem and let it sit in water from the kettle for a while, then transferred it to its own vase with plain room temp. water. It took a few hours for the hydrangea to completely revive, but it has done so and is all beautiful again. Hooray! Sometime when I have vodka on hand, I'll try adding a little of that too. Thanks so much! :o)
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