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.
More about cool-season crops. To keep leaves coming, you can sow seeds every two weeks for a continuous cilantro crop. Or, even better, try the method we perfected in Sunset's test garden last year: Grow cilantro as you would mesclun. Sow seeds thickly in a wide, shallow container; then, as soon as plants are 3 to 4 inches tall and sporting a couple of cuttable leaves, use scissors to cut off some foliage for cooking as shown.