How long do fresh-cut flowers last, and how can I make them last longer?

With proper care, most fresh-cut flowers can last 5-7 days or longer. To prolong their beauty, place them in a clean vase with fresh water and floral preservative, trim the stems at an angle, and remove any foliage below the waterline. Keep your arrangement away from direct sunlight, heat, and drafts, and replace the water every couple of days for optimal freshness.