Question
QUESTION: will the small clusters of hydrangeas wilt if i separate the stems from the main stem and put them in to a wet foam wedding arrangement???

ANSWER: Yes, as a rule the florets don't hold up once separated.  If you want to try, you can give it a better chance by dipping the stem briefly in boiling water then plunging into cool water; but either way I wouldn't expect a long lasting floret.

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QUESTION: even if the hydrangeas are purchased from a company that sells to the flower auction in burnaby-can i dip them in the special floral solution-how long would they last that way??? tx a million for your help

ANSWER: The only way I would attempt it is to first condition the entire flower very very thoroughly.  With Hydrangea, I would make a fresh cut, plunge briefly into boiling water (the heat and movement of the water disrupts any air pockets in the stem to ensure the water is brought completely to the to top of the stem), then submerge to the neck in tepid water and kept in a cool room for 24 hours out of direct sunlight.  Then repeat the process with the florets.  

I would do a test run... try the method before the big day and see how long the florets last for you.

You may find if it's the look of the small floret you want that you can achieve the aesthetic by using a different kind of bloom or even by using tiny pieces of silk hydrangea dispersed among the other fresh flowers.

Flowers grown for "cuts" will normally be better able to withstand the process than those from the garden simply by virtue of the cut flower growers expertise in selecting the best varieties, etc. for use.

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QUESTION: YOU ARE AN ANGEL!! THX FOR YOUR ADVISE.
JUST ONE MORE QUESTION. WHAT U EXACTLY MEAN BY BRIEFLY? 20-30 SECONDS?
AND THEN SUBMERGE ALL THE WAY TO THE HEAD WHERE THE FLORETS START TO BRANCH OUT? IF IT WORKS OUT CAN I SEND U SOME PICTURES??
TX MARIA.

Answer
My pleasure!  Even more briefly than 20 or 30... you want to dunk them in and out for just a few seconds.. 10 tops.  And then, yes... submerge all the way up the stem to where the florets begin to finish the conditioning.  And absolutely, I'd love to see the photos!