Posted this in chat, but got no replies. so: here goes again:
My sister-in-law bought me some tulips yesterday. As I arranged them in a vase, they flopped - as they do.
My dsil said that she knew a trick to make them stand up and stuck pins in the stem crosswise about an inch below the flower.
Lo and behold, this morning they are all standing up straight. She told me to take the pins out, which I did and they still stand up.
Does anybody else do this? Does anybody know how it works?