For flowers to last longer, follow these simple tips: Find a clean vase or other container for the flowers. We recommend cleaning it with a detergent—the less bacteria remain on its walls, the longer the flowers will remain fresh. Fill the vase with tepid water (flowers do not like hot and cold water). Cut the flowers with pruning shears or a sharp knife and immediately place them in water. Flowers should not be exposed to heat, drafts, cold, or direct sunlight. Do not place bouquets near radiators, under air conditioners, or on windowsills. Once a day, add fresh water to the vase. It’s best to change the water completely. To make flowers last longer, cut the stems every day.