Get rid of the water line in a flower vase by filling it with a solution of half water and half white distilled vinegar, or by soaking a paper towel in white distilled vinegar and stuffing it into the vase so that it is in contact with the water line.
Give acid-loving plants like azaleas, rhododendrons, hydrangeas and gardenias a little help by watering them with a white distilled vinegar solution now and again. Consider adding a cup of white distilled vinegar to a gallon.
Keep cut flowers fresh. Mix 2 tablespoons apple cider vinegar and 2 tablespoons sugar with the vase water before adding flowers. Be sure to change the water every few days to enhance your flowers’ longevity.
Test your soil. Put some dirt into a container and pour about 1/2 cup white distilled vinegar into it. If it fizzes or bubbles up, it is too alkaline. Simply add peat moss or sulfur to make your soil pH more neutral.