What type of water additive would prolong a bouquet of roses?

I heard you should add coffee grinds to rose bushes in an outside garden; I am interested in the care of cut roses.

What type of water additive would prolong a bouquet of roses?
An aspirin tablet seems to work fine, I use that if I am out of the additive they sell to preserve cut flowers. Chrismas tree preservative works great also and is far less expensive. I would stay away from sugar water, it'll attract ants and encourge the growth of molds.
Reply:i would suggest sugar water if tap water it should set mixed overnite
Reply:I have heard a birth control pill, you can try it. who knows. go to your local nursery,where you buy plants and stuff. and ask them what is the best additve that would work. good luck.
Reply:Add 1 teaspoon of bleach and 1 teaspoon of sugar. The bleach stops mold and mildew and the sugar will help the flowers survive for a few extra days.
Reply:Add a tablespoon of sugar to the vase of roses.
Reply:soluable asprin...

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