Consider using the pre-mixed flower packets that come with flowers from your florist or grocery store - these are universally agreed by specialists to be the best overall method for keeping flowers alive. They usually contain carbohydrates (sugars), biocides (cleansing agents), and acidifiers.
If you don’t have such flower packets, just open your kitchen drawer. Good news is that flowers do not necessarily need any special substances to make them stay longer.
Flowers truly get happier and grow faster after drinking soda (almost like kids). Add ¼ cup (50-100 milliliters) to water in your vase and watch the flowers prosper. We recommend you using Sprite if you don’t want the water to look coloured or muddy.
Again, flowers enjoy sweet things. Try adding one tablespoon of sugar in your vase to spruce up flowers.
Surprisingly, alcohol can slow the wilting process. For example, a few drops of vodka decreases the production of ethylene (gas that makes plants mature).
Aspirin is not only used to relieve the headache but also keeps flowers from dropping. One tablet can lower the pH level, so the water travels through the stem faster.
Bleach will fight the bacteria and other nasties in the water. Be careful - adding too much bleach can kill your plant completely. A ¼ teaspoon per 1 liter of water will be enough.
Apple cider vinegar
Use 2 tablespoons of sugar with 2 tablespoons of apple cider vinegar and ½ teaspoon of bleach for the whole vase. Acid will help to maintain the pH levels of water and feed the flowers with nutrients.