Then what happens? 

Well, I decided to test my substance against FLORAL LIFE flower preservatives.  On day 5, I realized that my substance (sweetened lemonade with an extra teaspoon of sugar), was definitely going to win. All the petals were still intact and the stem was stiff and rigid. The FLORAL LIFE, however, was basically dead.  More than three quarters of the petals had fallen off and the stem was drooping all over the place. That proves, that to prolong the life of fresh cut flowers, you'll need one cup of sweetened lemonade and one teaspoon of sugar!!!