Storing your tomatoes with the stem-end down at room temperature can greatly extend their shelf life. The area on the top of the tomato where the stem once grew provides an escape for moisture and an entry point for bacteria. You can test this by taping the top of the tomato and placing it next to a normal one - you'll see the difference. This could make for a great science experiment... or an extra delicious salad! ;)
By attosa from Los Angeles, CA
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If you have a large tomato crop, take a few extra minutes to wash your tomatoes in a weak bleach solution. A tablespoon of bleach to a gallon of water is a sufficient ratio for the solution. Do not rinse them. Spread your tomatoes out on newspaper in a cool, dry place.
Don't keep tomatoes or citrus in the fridge. The colder temperatures spoil the aroma and taste of these sensitive fruits.