Hi I'm Karen Rodowicz, owner of JK Flowers and I'm here to help you to preserve those fresh flowers so they bloom and look gorgeous in your home for as long as possible. Some of the easiest ways to do it is to first of all always add that floral food that comes with those fresh flowers. Many times it is attached to a bouquet or if they come from a local florist it is probably already added. Second of all if you are arranging your own bouquet maybe something from the garden if you don't have the floral food add in a teaspoon of bleach to your water that could preserve the water from growing mold. If you feel funny about adding bleach to your flowers maybe a little bit uncomfortable you might add too much change your water every two days. Make sure the water is always lukewarm and keep those flowers out of the direct sun and your flowers will stay fresh and beautiful long for you to enjoy. Once again I'm Karen with JK Flowers and I hope this keeps your arrangement looking wonderful.