All you need to know about PLU Numbers on Produce
As any good shopper will notice, fresh produce that is individually available has these stickers on them with either a 4 digit or 5 digit number. These numbers have definite meaning, and it is in our best interest as consumers to know the basics. First any 4 digit number that begins with a 3 or 4 is a conventionally grown product. Therefore, pesticides and herbicides were likely used in its production. For example, the picture of this avocado to the left. Now 5 digit num