According to the University of Arizona, you can grow it indoors, but I have never had any luck growing it indoors. Here is a website on container growing plants in Arizona. In south Texas, where it is very hot, we don't plant cilantro until the fall. It is a cool-weather herb that is planted in the fall, and should survive until it gets hot which is generally in April and May. Then it bolts, dies and doesn't come back until the fall. You might want to check with your county extension agent to see if there are any master gardeners in your area that can help you with the problem.

Plant multiple seeds in small pots, maybe 20 or more seeds per 2-3 inch pots. Plant succesive pots every 2-3 weeks for a continual supply. If indoor growing, give them plenty of sunlight if possible, but be sure they are kept cool indoors under 80 degrees. If they are not in sun for at least 8 hours per day, use plant lights and place these about 2-4 inches away from the pots and then plants. Leave the plant lights on from 6am to about 10pm. Use good quality seed starting medium, NOT potting soil or outdoor soil. The flat parsley shaped leaves last about 10 days after they start showing up. Add a little organic slow release fertilizer with nitrogen as the higher component once they start to sprout. DO NOT overwater!