Follow these methods, and your lemons will stay fresh for a whole month 

Buried in sand First, select intact lemons that are not bruised, wash them clean, and let them dry. Pour a layer of sand, then arrange a layer of lemons on top, continuing until all the lemons are used up. The sand should be moist; if it is dry, add water. Be sure to water it to maintain humidity, but don't soak it, as the lemons may become soggy. Place the jar of lemons in a cool place, away from direct sunlight. When ready to use, simply take the lemons out of the sand jar and wash them clean.

Puncturing the lemon peel

For large lemons that you don't plan to use all at once, instead of cutting them in half, use a toothpick to pierce a hole from the stem of the lemon deep inside, then squeeze out the juice. Afterward, seal the hole with tape and store the lemon in the refrigerator. Similar to the method of pressing two lemon slices together, this approach also limits air exposure and keeps the lemon fresh for 1–2 days.

Using vinegar

For partially used lemons, you can take a small plate, add a few drops of vinegar, and place the cut side of the lemon facing down on it, then store it in the refrigerator. This method will help preserve the lemon for 1–2 days. The acid and water in the vinegar will help maintain the freshness of the lemon’s surface, preventing it from drying out or becoming bitter.

Using a ziplock bag

Not only for whole lemons, but you can also use a ziplock bag to store cut lemon slices for 2–3 days while keeping them fresh. The process is simple: just place the lemon slices in the ziplock bag, press out as much air as possible, seal the bag, and store it in the refrigerator until your next use.

Using a food storage container

Food storage containers with airtight lids are also a good choice when you want to store cut lemon slices. First, wrap them with plastic wrap to prevent the lemon's flesh from coming into contact with the air, then place them in the container, close the lid tightly, and store them in the refrigerator. It's best to use them within a week and not keep them too long.

Using plastic wrap

If you don’t have a food storage container, you can simplify the preservation by wrapping the cut lemon with plastic wrap and placing it directly in the refrigerator. The plastic wrap prevents the lemon from being exposed to air, allowing it to stay fresh without drying out or becoming bitter. This method will keep the lemon fresh for 2–3 days.