I have tried many things when it came to getting flowers on special occasions; even picking ones from my rose garden. Sugar and aspirin are the couple I did most often. With this I added a penny. I was never sure why, but my Grandma always did this so of course it was a good thing!
Source: Article at doctor's office from older magazine.
By Luana M. from San Diego, CA
Cut flower arrangements will not last forever, but there are steps you can take to increase their longevity. This is a page about conditioning cut flowers for lasting arrangements.
This is a page about cut flower preservation recipes. When you buy cut flowers they often come with a packet of preserver to add to the water.
Sprite, 7Up, or other citrus based sodas help extend the freshness of cut flowers. The acid from the citrus improves the uptake of water keeping them hydrated and the sugar adds a food source. So use full-on citrus soda, not diet, and enjoy that bouquet longer.