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.
Once the cilantro plant bolts, let it go to seed and it will grow again for you next year. Or collect the cilantro seeds and use them as coriander in your cooking. So as you can see, with just a few tips for growing cilantro you can have a steady supply of this tasty herb growing in your garden.Print This Article.ou want to be growing cilantro in crowded conditions because the leaves will shade the roots and help to keep the plant from bolting in hot weather. If you are transplanting cilantro into your garden, dig holes 3 to 4 inches apart and place the plants in them.