Keep Your Flowers Away From Bright Lights And Heat
Many people think it is a good idea to put their vase of flowers next to a sunny window thinking that like plants, that is where the flowers would typically be the happiest. However, flowers that are cut are actually the opposite of potted plants.
They are already at their peak performance. More sun and heat will just encourage the flowers to mature quicker and die faster. Instead, keep your cut flowers in a cooler, darker place if you wish for them to last longer.