How to Pin A Boutonniere Like a Pro — Step by Step Guide! Fresh Flower Care — After Pickup Tips! Follow the Care Guidelines below:Keep the flowers in the box till you are ready to use them.Store them towards the from of the refrigerator.Keep refrigerated (40 degrees Fahrenheit) until the last possible moment.Avoid touching flowers; touching the petals may cause bruising that is not immediately visible but can appear as browning or wrinkled.Do not expose the flowers to heat at any time before the event (do not leave outdoors or in the car etc.)