Ok, This trick on using tulips comes from Kathi Thomas AIFD. She used this for a relatives wedding and I have used her technique several times since and thanks to this technique, I have no fear about promising tulips.
First of all...........Make up a mix of Elmers Glue and water - 1/2 glue and 1/2 water ( alternatively, you can use clear egg whites ) - you brush the tulips with this mixure. It will hold the blooms in a closed state.
Secondly, to secure the stems in a hand-tied, AFTER the egg/glue coating has dried, - take your CLEAR 1/4 inch grid tape.......begin at the top of a central grouping of tulips ( say three or four in hand ) and spiral the sticky tape around the stems going down the stems. Add more tulips and wrap again with the clear tape......again in a downward spiral.......continue with the next layer of tulips, then tape, tulips then tape.
The tape holds the stems securely.........is clear so it can be hidden with any and all manner of stem wrapping/covering.......and by going in a downward spiral......you lessen the chance of cutting into the stem. By using the tape, you also help to retard the growth of the stem and your bouquet holds it's shape better.
Now, Boutonierres/Buttonholes - trim the end of the stem to approximately two/three inches below the bloom. Dip/coat the ENTIRE stem/bloom with egg white or the elmers glue/water mixture...........let dry.
Take a galax leaf......use smithers oasis cold glue to wrap it around the tulips stem in a cone shape. If you want to add a bit of bling/accent to the bout, then use your glue to edge the galax with a length of gold cording.
I should mention that Kathi used this technique for a Texas summer outdoor wedding.