I wouldn't do that .. the temperature is your kitchen refrigerator is far too cold for flowers. Flowers do well in a cool environment .. not a 'cold' environment. The temperatures set in flower shop coolers are not as cold as a regular residential refrigerator ... PLUS .. they would be without light for far too long. You are not doing them any favours by putting them in the fridge.
Most of your florists store their flowers in coolers that are about the temperature of your refrigerator to extend the life of the flowers...so that should keep them fresh until Saturday. Make sure the stems are touching the water in the vase...if not in a vase, they will need water to stay fresh. A little Sprite in the water is said to help too...
In the fridge is fine - if you notice the floral shops have their own refrigeration units for flowers.
1. Trim the bottom of each stem at an angle. 2. Put the flowers in a vase of water. Use one of those additives to make flowers last longer, or just add a little sugar to the water. 3. Keep the flowers away from light. Light and heat make them bloom, which you don't want to happen yet.
they need to be kept cool not cold HERE"S A GOOD TRICK. if any of the outside petals turn brown/damaged simply pick them off. carefull best to tug quickly firmly down . its what florists do to make sure what YOU get is perfect even if they're not.
that's a good thing, because the elements will wilt the flowers, always put fresh flowers in the refrigerator. note: when you go into a florist all of the roses and other delecate flowers are in there refrigerator..... FE HARRIS