How to Read Fruit Packing-Date Codes in Supermarkets

She narrows her eyes at a plastic bag, then at a minute white sticker beside its seal. Her lips form silent words, as though she is reciting a code, before she puts one bag down and reaches for another at the back.

Moments later, a different shopper repeats the routine with grapes. Nobody says a word or offers an explanation. It is simply an odd, silent ritual involving flimsy produce bags and almost imperceptible labels.

Most of us pick the pack that looks “fine” and carry on. But some shoppers plainly know something that everyone else has missed.

The answer is printed so small that you have probably never looked at it.

The hidden message on that flimsy label

You have encountered this label countless times: a small rectangle containing a muddle of digits, perhaps a date, and sometimes a brief code that resembles a password rather than information about fruit.

For most shoppers, it fades into the background like the crinkle of the bag. Yet it can contain the one detail that reveals whether your berries were packed yesterday - or have spent the past week and a half travelling around the country in a lorry.

To supermarket buyers and warehouse teams, that piece of paper is a miniature record of the fruit’s journey. For shoppers, it can be a shortcut to genuine freshness.

Many pre-packed products - including berries, grapes, apples, citrus fruit and salad leaves - carry a packing date, lot code and, in some cases, a “display until” or “best before” date.

The useful part is knowing which detail matters when you want the first mouthful to be crisp or full of juice.

Some retailers make “best before” the prominent date. Others discreetly include the truly useful detail: the packing date.

That date tells you when the fruit was put into its bag, rather than merely when the shop wants it removed from the shelf.

That small distinction may be the difference between strawberries that taste of summer and strawberries that taste of a refrigerator.

One Tuesday morning in Manchester, a produce manager guided me along the chilled aisle and indicated a bag of mixed salad leaves.

“Look here,” he said, tapping the label where other people were focused on the large brand logo. Beneath the barcode and a cluster of numbers was a tiny entry: Packed: 02/12.

The bag at the front had been packed four days before. The one behind it was the same product but had been packed the previous day: 03/12. The price, branding and everything else were identical - provided you did not read the label.

He laughed. “We rotate the stock, of course. But shoppers move stuff around all the time. People who know the codes take the time to look.”

A 2023 survey by a UK waste charity found that households were throwing away an average of £60 of fresh food every month. A large share was fruit and vegetables bought as “fresh” that did not last the week.

Technically, those bags had not passed their dates. In practice, half of what was inside had deteriorated several days earlier.

There is a simple reason that this tiny label can matter more than the large wording on the front.

Fruit begins to change as soon as it is harvested. It continues to respire, lose water, turn starch into sugar, and eventually turn sugar into bland softness. Chilling slows that process, but cannot halt it.

“Best before” dates are frequently set with both a safety buffer and marketing considerations in mind. Supermarkets do not want empty shelves, so they allow a period in which fruit remains presentable even when its flavour is already declining.

By contrast, the packing date is blunt. It has no concern for offers or planograms. It records the actual day that your fruit went from orchard, field or packing line into its sealed bag.

When two bags share the same “best before” date, the one with the newer packing date will generally taste more like fruit freshly brought home from the market than fruit that has survived a long coach journey.

How to read packing-date codes like supermarket staff

The quickest approach is to turn the bag over and look for the tiniest print, normally close to the seal or beneath the barcode.

Search for terms such as “Packed”, “Pack date”, “Lot”, an “L” followed by numbers, or a discreet date that differs from the bold “best before” date on the front. That understated date is often the one the warehouse uses.

Where there is only a code, check how many digits it contains. Numerous UK suppliers use formats such as DDMMYY or YYMMDD without slashes. For instance, “051224” means 05/12/24, rather than an obscure batch number from another universe.

Take three bags of precisely the same item with the same “best before” date, then compare their small-print numbers. Select the bag with the latest packing date. It takes ten seconds and can give your fruit extra days of life.

Most shoppers assess fruit by its colour and perhaps a gentle squeeze, then hope it will be good when they get home.

There is nothing wrong with this, although visual signs can mislead. Grapes can remain glossy after losing their crispness. Blueberries may appear perfect until the punnet is opened and half of them are wrinkling around their stems.

We have all opened the fridge, reached for strawberries saved for later, and found a small white galaxy of mould looking back at us.

Checking the label cannot promise perfection. Fruit is unpredictable, seasons change and cold chains fail. Even so, shoppers who watch those little dates often say that their produce keeps for two, and sometimes three, additional days at home.

It is a modest advantage, but one that builds up over a week of breakfasts and packed lunches.

Let’s be honest: nobody truly does this every day. You will not decode every label during every shop, particularly when you are tired and trying to put dinner on the table.

The point is not to be flawless. Instead, use the label when it matters most - for a large shop, fruit for a party, or berries intended for a Sunday tart.

A nutritionist I spoke with summed it up neatly:

“If you’re paying for fresh, you deserve to know how fresh it really is. That label is the closest thing to the truth you’ll get in a supermarket.”

A few practical habits can make this feel less like a task and more like an effortless routine:

• Begin with one item, such as strawberries or bags of salad, and check only its packing date every time.
• When you have options, choose the most recent packing date, even when all the bags have been mixed up at the front.
• If you cannot work out a code, ask a member of staff once; you are likely to remember the answer next time.
• Avoid bags with condensation or moisture trapped inside, even when the date is favourable - water accelerates spoilage.
• Keep track mentally of how long fruit from each supermarket really lasts; freshness depends not only on the label but also on the entire supply chain.

What a tiny packing-date label changes in your kitchen

Once you start treating that tiny label as a guide, your fridge can begin to look rather different.

The “guilt drawer”, where fruit is left to be forgotten, becomes less depressing. It is not that you have suddenly become more organised; your food is simply lasting more nearly as long as the packaging suggests.

Your routine may shift slightly, too. Eat the bag with the earlier packing date first, and hold back the particularly fresh punnet until later in the week. It is not an elaborate system, merely a subtle reordering based on what the label tells you.

Taste is where the difference is most noticeable. A nectarine that spent two additional days waiting before it was packed ripens very differently from one bagged while it was still firm and cold.

This is not about becoming suspicious or monitoring every item in your trolley.

It is about using a small piece of insider knowledge borrowed from people who handle huge volumes of fruit every day. Warehouse workers and shop staff use these codes to keep stock moving and reduce waste.

You can use the same information for other reasons: fewer disappointing mouthfuls, less money thrown away, and fruit that tastes more like the image on its packet.

The label has always had this power; we just rarely bother to read it.

The more attention you give it, the more apparent it becomes that supermarkets rely on quiet systems like this - unseen by people rushing in after work, but obvious to those who spend every day in chilled aisles.

Perhaps that is why the woman in the apple aisle stays in your thoughts. She was not an expert; she was simply someone who had learnt a small, useful trick and chosen not to forget it.

There is a quiet satisfaction in that: the sense that the weekly shop need not be a lottery, and that you are entitled to know a little more about the food entering your kitchen.

You may mention it to a friend, or point it out to your partner next time you are beneath unforgiving supermarket lights, debating which grapes will make it through the week.

After you have noticed the code and understood its effect, it is surprisingly difficult to ignore.