1st, Trim your stems
The ends of your stems will feel dry when you get them, meaning they won’t be able to drink much water. Just trim 3-5cm off their ends at an angle to help them out. And repeat the process every 2 to 3 days.
2nd, Remove some leaves
Remove any leaves that’ll fall below the waterline of your vase or they’ll deteriorate in the water. If this happens, they'll drink the dirty water and fade faster. Pay close attention, and feel free to remove any dying leave.
3rd, Change the water
In order to keep your fresh flowers longer, you need to change the water every 2 to 3 days, with a room-temperature water: not too cold, not too hot.
4th, Find light
For your flowers to feel great and sparkle your home sweet home, they need light. Find them a spot with enough sun exposure for the day.