Just a little tip I learned last year. When your cilantro bolts...... which it ALWAY will (especially right when you want to use it), DON'T pull it out!! (By the way, "bolting" is when the herb suddenly grows really tall and flowers). Let it go, watering lightly, until the flowers are gone and turn into little balls on the end of the branches. As soon as most of these balls are brownish in color, cut the stalks and put them upside down in a paper bag.
When they are all dried, you take all of the balls off the stems. Then, gently rub over them with your hand to get any extra stem or leaf off. Bottle them up and store with your spices. When it is time you use them, you can grind them up or just crack them with the back of a spoon (for coarser uses). They smell so good.... and are great to use in cooking. Grow one plant and harvest two different products. Double duty herb!