How to keep leafy vegetable fresh for longer time? Generally, leafy vegetables like coriander leaves, mint leaves, methi leaves, spinach, spring onions and so on tends to get bad even when stored in refrigerator. To keep them fresh for longer duration, you should first dry them up (if there is water) by leaving them spread open in the room on a paper. Once water gets dried up, roll the vegetables in the same paper, place it a zip lock or plastic bag and store in refrigerator. Whenever you want to use it, take out how much ever you want, and then rinse with water and use it. This could keep your vegetables for about one and half weeks in good condition.