Here’s a tip to make cut flowers last longer.
My husband buys me a single rose for different occasions and dissolving an aspirin tablet in the water as a substitute for plant food lasts for about 3 days. When I change the water, I add another aspirin.
My flower stays like new for about two and a half weeks. I can persuade cut flowers from the supermarket to last close to a month using this method! Jeannie
Just changing the water everyday will help them to last longer. You may also use a tiny bit of bleach in the water, to keep the bacteria levels down.