To make flowers last longer, re-trim the stems at a 45-degree angle, change the water every two days, keep the flowers away from direct sunlight, and use special flower food. If you [Send Flowers Online](https://saiflower.com/send-flowers-online) through Sai Flower (Shop No 1, Sai Mandir, Lodhi Rd, Lodi Colony, New Delhi; 088020 04527), the flowers arrive fresh and ready to last.