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If you unwrap celery when you get home from the store, then wrap it tightly in aluminum foil and refrigerate, it will last for several weeks. I always had celery go bad very quickly until I found this out. Now it keeps until it's used.
Source: A friend told me to do this.
By quilterj from Columbus, NE
Celery tends to quickly go limp in the refrigerator. Keep it crisp by rolling it in two sheets of paper towels, then a layer of aluminum foil. Slip the rolled-up celery back in the plastic bag it came in, then tie with a twist tie. It will remain crunchy even after four weeks in your fridge's vegetable drawer.
By Ziggi from San Diego, CA
To keep your celery from going bad after you remove what you need from the stalk, wrap the remaining celery in tinfoil (twist tinfoil ends) and keep it in your refrigerator. It will last a long time
By Tommyd from Dudley, MA
Although I do not eat raw celery, I try to always keep it on hand for cooking. Lately I have noticed that another celery option is available in the grocery stores... pre-cut celery stalks. My husband brought these home for me once, and I was disappointed in their brief fridge life. I can't imagine that there is any benefit to buying these pre-cut pieces which are more expensive and which do not last as long. I buy the whole celery and can keep it for quite a while by doing the following:
First, when selecting your celery, look in the back of the produce case. A produce employee should have rotated the celery when putting out more, meaning that the freshest bunches should be in the back (such as when choosing milk). Pick a tight bunch that has no sign of browning or dry tips. I store mine in the bottom of the fridge in the plastic bag it came in.
When I begin using my celery, I peel off one individual stalk at a time. This keeps the other stalks intact and doesn't leave open, cut ends of the remaining stalks which will lose moisture.
My mother "always" peeled her celery when cooking. I never do and have never had any problems. I remember watching her laboriously peeling each stalk, creating waste and losing time. She has eaten food I have cooked with celery and has never noticed that I don't peel!
I use every part of each individual stalk right down to the very end, then I give this bottom piece to the rabbits or guinea pig. I definitely use the leaves, as they are full of flavor.
As time passes, the leaves on the remaining stalks on the bunch in the fridge will begin to dry out. Right as this begins to happen, I start to cut the tops off and use them for cooking, leaving the rest of each stalk attached to the base. Doing this, I can extend the life of the celery further, as wilting seems to begin from the leaves downward.
If I know I will not be cooking any other dishes with the celery and it is starting to look less fresh, I chop it up and put it in a baggie in the freezer to use for soup. Frozen celery works very well in most dishes. Nothing is ever wasted except for the very end... which of course isn't wasted because it goes to a pet!
By Shawna 
If you like celery be sure to wrap it up in foil when you put it away in the fridge, it'll last for ever, weeks anyway!
Janet from Bangor ME
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Here are questions related to Storing Celery.
I recently read something about keeping celery fresh much longer by wrapping it in foil. What I missed was. Do I take the plastic cover off of it? And do I wash it before wrapping it?
Judy from Birmingham, AL
By (Guest Post)05/03/2008
Wash the celery. Slice into sticks. Store in a glass container with water. The celery will remain fresh and crisp. My mother used to do this with celery and carrots so that we had healthy snacks always at the ready.
I have two celery bags that I can store the stalks in, however after awhile they still go limp? What can I do about this?
By frances 09/24/2013
I have had success storing celery in aluminum foil. Just make sure the stalk is dry, and wrap it completely in heavy duty foil, and store in the refrigerator. Each time you remove a rib, just re-wrap the stalk. I have been able to keep celery fresh and crisp for up to 3-4 weeks using this method.
What is the secret to keeping celery fresh to the last stalk? We (my spouse and I) found out that eating celery every day seems to help with lowering blood pressure. Our only problem is keeping it nice and crisp to the last stalk.
By Kathryen from northern Virginia, VA
By frances 05/22/2013
Dry the stalk of celery well. Wrap it completely in aluminum foil, molding the foil to the celery as tightly as possible. Each time you use some celery, just re-wrap the rest in the foil and put back into the refrigerator. I have kept a stalk of celery fresh for as long as 3-4 weeks using this method.
I read in your newsletter about wrapping celery in foil to keep it crisp. Thanks for the tip. I have a question though, I have read elsewhere about cutting the celery. Do I need to cut the bottom off the bunch of celery before I wrap it? Thanks.
Darlene in Mississauga
I wrap the whole stalk of celery in paper towel and place it in those green bags. I swear by these bags. I use them for all my veggies and the brown ones for my bread.
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If you wash and dry your celery, then wrap it in tin foil. It will last twice as long. Don't laugh, it really works. I didn't believe it either until I tried it and, believe me, it really does work. Keep it near the bottom of the fridge or in one of the drawers.
Source: Its a tip that came in our local neighborhood magazine, the Bowester.
By Barb from Calgary, Alberta, Canada
By Rita Purvis
By Zelma Bieard Ragsdale
By Bobbie Gillette
By Aunt Sharon from Texas
I have learned that if you fully wrap your bunch of celery (unwashed and uncut with the twist tie removed) in foil and store it in the fridge it will last longer. I just used the last of some I stored a little over 4 weeks ago! I like to keep it on hand but used to end up throwing out about half as I did not get it used up before it started going bad. I know you can freeze it for cooking but I love having it fresh also.
By Mumsey from San Antonio, TX
By Katydid, Australia
Carolyn from NC (08/19/2008)
I read a tip about refreshing wilted celery. My tip is, don't let it wilt. You can buy one or two stalks of celery, use what you need at the time, wash all of it, chop some of the coarser parts up and freeze to add to soups and stews when needed, but cut the rest into about 4 inch pieces and wrap bunches of it tightly in aluminum foil. It will keep a long time in the fridge. I have had some last more than three weeks, and still be crisp enough to use in a salad.
By Loretta from Theodore, AL
Extend the life and quality of celery by wrapping tightly in foil before placing it in the crisper of your refrigerator. It lasts for a very long time.
By TxTiket2Ride2 from Fort Worth, TX
Celery will keep for weeks if it's tightly wrapped in aluminum foil. Wash it and dry it as soon as you get it home from the store, then seal the stalk in foil. You'll be surprised at how long it'll last!
By julievojo from SE Minnesota