For roses, always recut under water to prevent air bubbles from forming within the stems. C. Make a diagonal cut with a very sharp knife, holding the flower head towards you and drawing the knife, blade parallel with the ground, away from you down the flower stem. Don't slice down onto a hard surface or cut with scissors. Both of these are more likely to cause crushing. Or you can pick up a packet of preservative from almost any florist.
Flowers add so much beauty to life.
I hope this helps you extend their life so that you can enjoy them longer. Quality will never be compromised.