The Best Vinegar For Keeping Cut Flowers Fresh

Nothing can brighten a space like a bouquet of cut flowers, but their fleeting freshness can be a bummer, especially when those wilting blooms are also withering away your budget. Luckily, if you don't have a packet of flower food handy, the next best thing for improving how long cut flowers last may already be in your pantry. White vinegar's acidity and natural antimicrobial capabilities make it an excellent base for DIY flower food to help keep your cut flowers fresh. Using it in tandem with sugar for food, you'll have more time to enjoy your fresh-cut florals before they pass their prime.

Cut flowers have four basic needs: water, food, sanitation, and cool air temperatures. Commercial flower foods are formulated to address the first three all at once, typically combining sugar for nutrition, an ingredient such as bleach to discourage bacterial growth, and citric acid to gently acidify the water. This helps explain the thinking behind homemade vinegar and sugar solutions: Vinegar supplies acetic acid to inhibit microbial growth, while sugar provides a source of food.

To make DIY flower food with white vinegar, add 1 tablespoon of sugar and 1 tablespoon of vinegar for every 2 cups of water needed to fill your vase. Stir until the sugar is completely dissolved. Freshly cut flowers tend to do best in warm water (many florists aim for temperatures of around 100 degrees Fahrenheit), so your mixture should be ready to go if it's no higher than 110 degrees Fahrenheit.

Before adding your flowers, cut the stems back at a 45-degree angle, which increases their surface area to help drink up more water. Water should be replaced at least every two to three days to avoid bacterial growth. When you replace the water, recut the flower stems before adding them back in. Also, be sure to remove dead flowers so they don't contaminate the water and cause the remaining stems to deteriorate prematurely. 

Lastly, if possible, display your flower vase in a cool area, away from direct sunlight, as excessive heat and direct sunlight can sabotage your efforts to keep their blooms fresher. Ideally, you want room temperatures between 65 and 72 degrees Fahrenheit to keep your cut flowers looking their best.