In addition to changing the water regularly, keep your flowers in a cool area away from direct sunlight, heat, and drafts. Also, trim the stems slightly every few days to improve water absorption.
Is there any special care for delicate flowers?
Delicate flowers like peonies, ranunculus, or anemones should be kept in cool, shaded areas, away from drafts. Handle them gently to avoid bruising, and change the water frequently to prevent wilting.