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Vodka
Vodka
ISTOCK/KARANDAEV

The secret to keeping cut flowers looking good as long as possible is to minimise the growth of bacteria in the water and to provide nourishment to replace what the flower would have gotten had it not been cut. Add a few drops of vodka (or any clear spirit) to the vase water for antibacterial action along with 1 teaspoon sugar. Change the water every other day, refreshing the vodka and sugar each time.