I can have a continuous supply of this most important ingredient for salsa and other Southwest dishes. The only problem with cilantro is that it gets leggy and goes to seed quickly. Arrange your system so that you can start new seeds every month or so. Cutting off the flowers helps but only to a point. Lesson number two, when you choose a hydroponic system, select one that makes it easy to remove and replace one plant without distrubing the rest of your crops.
Chilies can grow for years while some herbs have productive lives of only a few months.
The first year, I made another common mistake. I tried to plant too much. The first year I planted several tomato plants, cucumbers, basil, cilantro, and jalapeno peppers. All of the crops grew well for a while, but the larger ones soon blocked all the light from the others. I had a tangled mess.