How to Preserve Lemons by Fermenting

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image of fermenting lemons preserved in jar

I used to think it was silly to preserve lemons because they were available year round at the store whenever I happened to need one. Then I tried my first Meyer lemon and preserving lemons became a necessity. We have an amazing lemon tree that gives us several hundred pounds of lemons each year. So, every year you’ll find me freezing, dehydrating, and fermenting lemons.

My ultimate goal is to have lemons preserved for the entire year. This includes juice for lemonade during the summer, zest and juice for cooking, dehydrated lemons slices, lemon salt and sugar and fermented lemons.

There are several ways to make fermented lemons, which a lot of people call ‘preserved lemons’ and use the terms interchangeably. You can use an airlock system …or not, you can use whey or culture starter….or not, you can cut the lemons….or not. Truly, fermenting lemons is a very versatile process, which is true of fermenting most foods.

Fermenting lemons appeals to me for several reasons. One is that you use the entire lemon. Fermenting lemons makes even the rind edible. Another reason is that preserved lemons are pretty simple to make and no special equipment is needed.

image of fermented preserved lemon slices

How to make fermented lemons

I like to make fermented lemons with just salt and lemons. The salt and lemon juice will combine to make a brine which will inhibit mold from growing and will allow beneficial bacteria to grow. I’ll link to some other ways make fermented lemons below.

To make a quart size jar of preserved lemons you need 5-6 organic lemons, 3 tablespoons of sea salt, and a wide mouth quart size mason jar and lid. That’s it!

First make sure your lemons are clean. Since we grow our lemons I just make sure there’s no bird droppings or visible dirt on them. If there is I wash them, if there isn’t I don’t.

Next, cut the lemons into pieces. You can cut them into quarters but not quite all the way through. That way when they come out of the jar the whole lemon will come out together. Or, if you don’t care about that just quarter them, or cut them into slices or chunks. Whatever look you like best is fine.

Sprinkle salt on the inside of the lemon and put it into your mason jar. (I sterilized mine, like I do when I’m canning). Continue cutting and salting and putting the lemons in the jar. When the jar is full, squish the lemons down and add more.

When the jar is completely full and if the lemons aren’t totally submerged in the juice, juice another lemon or two and add the juice to the top. Sprinkle with the last of the salt. Put plastic wrap over them and pushed the lemons down. You want to make sure that they stay totally submerged in the lemon juice.

Put the lid on and set on the counter. You’re going to let them sit out for two weeks. Make sure to turn over the jar upside each day to keep the salt from settling. After two weeks put them in the refrigerator. This will slow down the fermenting process.

You can also ferment lemons using a brine or culture starter.

image of fermented lemon slices

How to use fermented lemons

Preserving lemons by fermenting really mellows the lemon flavor making even the rind edible. Meyer lemons are sweeter and more mild than regular lemons but I wouldn’t munch on the rind…unless it’s fermented.

Before using fermented lemons I like to rise them off and pat them dry as I find saltier than I like. A lot of people don’t rinse the fermented lemons so try it both ways and see what you prefer.

Fermented lemons can be used in anything you would use fresh lemons in. I think they are wonderful on baked fish and in lemon chicken stir fry. You can also use preserved lemons in pasta or soup. They can also be used in sweet dishes like double lemon pound cake or how about a ginger lemon pound cake?

Here’s an interesting sweet preserved lemons recipe, these would be wonderful for tea.

image of lemon slices for preserved lemons

Fermented {Preserved} Lemons

A jar filled with preserved lemons submerged in liquid sits on a wooden surface. A wooden spatula rests nearby, and a cutting board is partially visible.

Make fermented lemons with just salt and lemons. The salt and lemon juice will combine to make a brine which will inhibit mold from growing and will allow beneficial bacteria to grow.

Ingredients

  • 5-6 lemons
  • 3 Tbsp sea salt

Instructions

  1. Make sure your lemons are clean and free of any bird droppings or visible dirt
  2. Cut the lemons into pieces. You can cut them into quarters but not quite all the way through. That way when they come out of the jar the whole lemon will come out together. Or, if you don't care about that just quarter them, or cut them into slices or chunks. Whatever look you like best is fine.
  3. Sprinkle salt on the inside of the lemon and put it into your mason jar. Continue cutting and salting and putting the lemons in the jar. When the jar is full, squish the lemons down and add more.
  4. The salt and the juice will combine to make a brine.
  5. When the jar is completely full and if the lemons aren't totally submerged in the juice, juice another lemon or two and add the juice to the top.
  6. Sprinkle with the last of the salt.
  7. Put plastic wrap over them and pushed the lemons down. You want to make sure that they stay totally submerged in the lemon juice.
  8. Put the lid on and set on the counter. You're going to let them sit out for two weeks. Make sure to turn over the jar upside each day to keep the salt from settling. After two weeks put them in the refrigerator. This will slow down the fermenting process.
  9. Preserved lemons can be stored in the refrigerator for up to a year.

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27 thoughts on “How to Preserve Lemons by Fermenting”

  1. Just wondering: if you must refrigerate after making, what is the point? I thought that fermenting meant that is was preserved, and did not require refrigeration.

    Reply
    • Well, it is preserved but not indefinitely. I’m not sure how long it would be good just on the counter but I’m pretty sure it will be longer than an unfermented lemon. Also, this isn’t a way I would choose preserve large numbers of lemons but I think it will be nice to have them this summer when I’m completely out of fresh lemons. My favorite way to preserve our lemon harvest is to dehydrate the zest and then juice the lemons and freeze the juice.

      Reply
  2. What an interesting post, I’ve never thought of preserving lemons this way. Now I want to try it myself! Thanks for sharing your post on the HomeAcre Hop, I’m going to feature it tomorrow! Come back and share another post tomorrow! – Nancy
    The Home Acre Hop

    Reply
  3. I just made this recipe today. There is a ton of lovely juice and you only mention using the lemons themselves. Will the brine (lemon juice) be too salty to use for anything ? Also I used an easy ferment lid with a weight and I am wondering how critical turning it upside down is?

    Reply
    • Oh, definitely use the juice! I need to edit the post and mention that. I use it to season dips or veggies. It is salty but it gets less salty as it ages. I hear it makes a mean margarita so if you enjoy those you might give it a try. As far as turning them upside down, I would just look for salt collecting in the bottom of the jar. The salt needs to be throughout the jar to inhibit bacteria growth, so if you see a bunch collecting on the bottom, just open the jar and give it a stir. Then put your weight and fermentation lid back on.

      Reply
      • My lemon ferment is nearly at its 2 weeks. I did not see any bubbles as I usually do when fermenting. They do look pretty and there is no mold so I guess that’s good. There is pink on the bottom which I assume is some salt settled .? I guess my question is if bacteria was to grow it would be on top an I correct ? Thanks for your patience. I am relatively new to fermenting and a little nervous

        Reply
        • Susan, as long the lemons were fully submerged in the liquid and there’s no mold on top they should be fine. The pink is probably the salt if you used pink salt. The brine should be cloudy and there will probably be sediment at the bottom of the jar. The longer the lemons sit, the more the sediment grows. They should smell like lemons and taste like a tangy lemon. I totally understand you being nervous. I was at first too. Every once in a while I have a batch of fermented food go bad, but it’s easy to recognize because it either has mold on top or smells really bad.

          Reply
  4. This may seem like an odd question, I am wanting to eat more fermented foods for the benefit for adding the gut (and the microcosm living there).
    I happen to have an abundance of lemons available – which brought me here. The recipe sounds wonderful! My question however is, will these fermented lemons provide the beneficial effects for the gut as would something such as fermented cabbage? Or is this completely different?

    Reply
    • Not an odd question at all! Yes, fermented lemons have beneficial microbes that are gut friendly, just like other fermented food such as sauerkraut.

      Reply
  5. Step 7-8, you put the plastic on…then mention putting the lid on. Are you just putting the metal ring on top of the plastic wrap or are you putting the metal top on as well? Do they need to “burp” and have some air in them? Thanks so excited to make these!

    Reply
    • I just put the metal band on over the plastic. No, they do not need to “burp” because it won’t be and airtight seal. Enjoy!

      Reply
  6. How do you turn these over if they are not sealed tight? I have fermenting pickle pipes and weights to keep them emerged do I have to use plain lids instead so I can turn them over? Wouldn’t the salt be throughout the brine enough to just leave fermenting on the counter?

    Reply
    • Hi Kim, I just tighten the lid momentarily and turn them over a couple of times and then loosen it again. If you’re using a fermenting weights and lid, I wouldn’t worry about turning it over.

      Reply
  7. Is the plastic placed on to keep air away from the lemons? So top with plastic, then lid. Or can the can the jar be topped just with the mason jar lid?

    Reply
    • Yes, just to keep out the air. Also, once it starts fermenting the acid can corrode a metal lid. You can use a fermenting weight if you don’t want plastic. Also you can use a plastic lid instead of a metal one.

      Reply

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