The small stickers on fruit contain more information than most people realize. Those tiny labels use a standardized numbering system that tells you whether produce is conventionally grown or organic, what variety it is, and even its size. Understanding a few simple rules lets you decode any piece of fruit in the produce aisle.
What PLU Codes Mean
The numbers on fruit stickers are called PLU (Price Look-Up) codes, and they’re part of an international system managed by the International Federation for Produce Standards. These four- or five-digit codes identify the specific commodity, its variety, and how it was grown. A Fuji apple has a different code than a Gala apple, and a large navel orange has a different code than a small one.
The key distinction is between four-digit and five-digit codes:
- Four-digit codes mean the fruit was conventionally grown. This is the most common type you’ll see. Examples: 4011 for a yellow banana, 4131 for a Fuji apple.
- Five-digit codes starting with 9 mean the fruit is organic. The code is simply the conventional four-digit number with a 9 added to the front. So an organic yellow banana is 94011, and an organic Fuji apple is 94131.
There’s no hidden meaning within the four-digit number itself. No single digit tells you the country of origin or a specific growing practice. The code is assigned as a whole to identify that particular product. If you see a code with more than five digits, it falls outside the standardized international system.
The GMO Prefix That Never Caught On
You may have read online that a five-digit code starting with 8 indicates genetically modified fruit. This was once reserved as a possibility, but the prefix was never actually put into use by the produce industry. The international standards body that manages PLU codes does not use the 8 prefix to identify GMO produce. If you see a five-digit code starting with 8, it simply identifies a different product in the database, not a growing method.
Instead, genetically modified foods in the U.S. fall under the National Bioengineered Food Disclosure Standard. Products that contain bioengineered ingredients are required to disclose this through one of several methods: the word “bioengineered food” printed on the package, a circular green-and-white symbol with the word “BIOENGINEERED” inside it, a QR code or digital link, or a text message number you can contact. For loose, unpackaged fruit, this disclosure is less common because very few whole fruits sold in U.S. stores are currently bioengineered. Papaya from Hawaii and some varieties of apple are among the few exceptions.
Organic Stickers and What They Guarantee
A PLU code starting with 9 tells you the fruit is organic, but the green-and-white USDA Organic seal is the more authoritative marker. To carry that seal, the fruit must be certified by a USDA-authorized agent and produced without synthetic pesticides, genetic engineering, ionizing radiation, or sewage sludge.
On packaged fruit products, you may notice two slightly different claims. “100 Percent Organic” means every ingredient is organic. “Organic” means at least 95 percent of the ingredients are organic, with the remaining 5 percent drawn from an approved list. For a whole apple or a bag of oranges, this distinction rarely matters since they’re single-ingredient foods. But for dried fruit mixes or fruit cups with added ingredients, the difference can be meaningful.
Country of Origin Labels
Fresh and frozen fruits and vegetables are covered by Country of Origin Labeling (COOL) requirements in the United States. Retailers like grocery stores and supermarkets must notify customers where the fruit was sourced. You’ll typically see this as a small line of text on the sticker itself, on the bin where loose fruit is displayed, or on the packaging for bagged or boxed produce.
This is worth checking if it matters to you whether your grapes came from California, Chile, or South Africa. The label won’t always be on the fruit’s individual sticker, so look for signage on the shelf or display bin if you don’t see it on the fruit itself.
Wax Coatings and Surface Treatments
Many fruits are coated with a thin layer of wax after harvest to retain moisture, extend shelf life, and improve appearance. Apples, citrus, and cucumbers are common examples. The coatings typically use food-grade substances like shellac (derived from lac insects) or carnauba wax (from palm leaves), both of which are considered safe for consumption.
The FDA requires that waxed produce be labeled. If the fruit comes in a package, the wax must be declared on the label. If it’s sold loose in bulk, the retailer is responsible for displaying the wax information on a sign, counter card, or the bulk container’s original labeling. In practice, many stores post a small sign near the produce bin. If you don’t see one and want to know, the store is technically required to provide that information.
Packaged Fruit vs. Loose Fruit
The labeling rules change depending on whether fruit is sold loose or in a package. Nutrition labeling for raw, unpackaged produce is voluntary in the United States. That’s why you won’t find a Nutrition Facts panel on a single loose apple. Some stores voluntarily post nutrition information near the display, but they don’t have to.
Once fruit is packaged, more labeling rules kick in. Pre-cut fruit cups, dried fruit bags, and frozen fruit packages all require a standard Nutrition Facts panel listing calories, sugars, and other nutrients. They also need an ingredient list, which is where you’ll spot added sugars, preservatives, or those wax coatings mentioned earlier. If you’re comparing a bag of frozen mangoes to a bag of frozen mango chunks in syrup, the ingredient list and Nutrition Facts panel are where the real differences show up.
Are Fruit Stickers Safe to Eat?
The stickers themselves and their adhesives are regulated as food contact substances by the FDA. They must meet a safety standard of “reasonable certainty of no harm” under normal conditions of use. That said, they’re not intended to be eaten. The adhesive is food-safe, meaning it won’t harm you if trace amounts remain on the fruit after you peel the sticker off, but you should still remove stickers before eating or cooking. A quick rinse after removal takes care of any residue.