How-to guide
How to Store Preserved Lemons — Keeping a Jar Good for a Year
Preserved lemons are made to last, and a well-kept jar stays good for up to a year — but only if you store it right. The salt and the lemons' own juice do the preserving, so the golden rule is simple: keep the lemons submerged in their brine and never introduce anything that could contaminate the jar. This guide covers keeping them safe, before and after opening. If you have not made a batch yet, see how to make preserved lemons first.
5 minutes
Step by step
- 1
Keep them submerged
The lemons must stay fully covered by their salty brine at all times, as any peel exposed to air can grow mould. If the level drops as you use them, top the jar up with fresh lemon juice — never water, which would dilute the preserving brine and risk spoilage.
- 2
Use clean utensils only
Always lift lemons out with a clean, dry fork or spoon, never your fingers, and never a utensil that has touched other food. Introducing bacteria or moisture is the main way a good jar goes bad. A dedicated clean fork kept for the purpose is a sensible habit.
- 3
Store unopened in a cool, dark place
While curing and before opening, keep the sealed jar somewhere cool and dark, such as a cupboard or larder. Steady, cool conditions suit the slow cure. Turn the jar occasionally in the early weeks so the brine bathes all the lemons evenly.
- 4
Refrigerate after opening
Once opened and in regular use, keep the jar in the fridge. The cold further slows any spoilage and keeps the lemons good for many months. Make sure the lid is sealed properly between uses so the brine does not evaporate or pick up fridge odours.
- 5
Top up the brine as needed
As you use lemons and the level falls, keep topping up with fresh lemon juice and a little extra salt so the remaining lemons stay covered and well preserved. A jar kept topped up and submerged will happily last many months of regular use.
- 6
Check before using
A healthy jar smells sharp, salty and lemony, and the brine may look slightly thick or develop harmless white specks of salt or yeast that rinse away. Discard the jar if you see fuzzy mould, or smell anything genuinely putrid or off, rather than sour and salty.
Common mistakes to avoid
- Letting the lemons sit above the brine, where exposed peel can mould.
- Topping up with water instead of lemon juice, diluting the preserving brine.
- Dipping in with fingers or a dirty utensil, introducing bacteria.
- Leaving an opened jar out of the fridge for long periods.
- Confusing harmless salt or yeast specks with true spoilage, or vice versa.
Tips from the kitchen
- Keep a clean, dry fork just for lifting out lemons.
- Always top up with fresh lemon juice, never water.
- Refrigerate the jar once opened to extend its life to many months.
- Keep the lemons fully submerged — this is the single most important rule.
- A little cloudiness or white salt crust is normal; fuzzy mould is not.
Questions
How long do preserved lemons last?
A properly made and stored jar keeps for up to a year, and often longer. The salt and lemon-juice brine preserve them, so as long as the lemons stay submerged and you use clean utensils, they remain good for many months. Refrigerating the jar after opening extends its life further still.
Do preserved lemons need to be refrigerated?
While curing and unopened, a cool, dark cupboard is fine. Once opened and in regular use, it is safest to keep the jar in the fridge, where the cold slows any spoilage and the lemons keep for many months. Either way, keep them submerged in brine and always seal the lid well.
How do I know if preserved lemons have gone bad?
Trust your senses. A good jar smells sharp, salty and lemony. Harmless white specks of salt or a little cloudiness in the brine are normal and rinse away. But if you see fuzzy or coloured mould, or smell anything genuinely putrid rather than pleasantly sour and salty, throw the jar out.
Can I top up the jar with water?
No. Always top up with fresh lemon juice, and a little extra salt, to keep the lemons covered. Water dilutes the salty brine that does the preserving and can lead to spoilage. Keeping the lemons fully submerged in strong, salty, acidic brine is exactly what allows them to last so long.
Learn it hands-on in Marrakech
Reading is one thing; doing it beside a local host is another. Book a Marrakech cooking class, or explore the medina on a guided food tour.