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.
One way to help keep your Cilantro plants from bolting is to grow cilantro it in the ground with plenty of mulch on top of the roots, this helps keep the soil cooler longer into the day. One other trick is to plant Cilantro very close together, shading the roots and thus keeping them cool.ilantro will reseed itself in your garden if you allow the plants to flower and develop seeds. Harvest coriander seeds as soon as they turn brown by shaking the seed heads over a paper bag. Allow the seeds to dry and store them in airtight jars. This is a good example of a cilantro plant that has started to go to seed.