For that reason you need to put your National Drug Code (NDC) into a Universal Product Code (UPC) barcode in the United States. A UPC-A barcode symbol contains a GS1 GTIN-12 data structure. Here is what you need to do to convert your NDC into a GS1 GTIN-12:
How to Harvest Cilantro. 1  Cilantro leaves can be cut at any time during their growth period, but waiting until the plant is about 6 inches tall will give you optimum leaves.  Cut the outer leaves first, allowing the smaller leaves that are closer to the stalk to continue to grow and mature.
When plants begin to bloom, the foliage becomes scarce; for steady harvest, set out plants every 3 to 4 weeks until the weather gets warm in spring, or until the first frost of fall. Cilantro frequently self sows. As seeds fall to the ground, little plants often come up during the season and the following spring.