I would like to extend a little knowledge here. There are different types of mold, but I think he is talking about botrytis mold or grey mold. I would assume, because OP never specifies exactly what. He could have had powder mold too... which is substantially different. Also watch out for spider mites, if you get those, you have to take EVERYTHING down, bleach EVERYTHING, and start over a very costly endevour.
IF it was botrytis mold, that generally occurs when the room doesn't have enough airflow/space around the plants, but personally my biggest problem with the grey mold was when my plants got HUGE, I would find a few colas with grey mold and if I didn't harvest right then, more and more, it is really hard to stop once it starts. The bad thing is, most people will still sell this, they just cut out the moldiest parts and sell the rest of the plant. This is not medicine, it doesn't help people, it gets them sick. The mold spores are already all over the place and damage has been done, usually to the best part of the plant.
Anyways, the best way to prevent this is with proper environmental controls, but in my experience I have found strain and if you grow from clone or seed matters A LOT. If you buy clones then who are your clones coming from? It seems a lot of people selling clones don't know are don't care that they are passing bad genes on that are more susceptible to these kinds of molds.
I grew in 2 warehouse in CA for 5+ years, also look
http://www.ilovegrowingmarijuana.com/marijuana-diseases-gray-mold-bud-rot-botrytis/Good Luck with your business I wish you much success.
Thanks for posting up. The mold issue was due to the airflow in the grow room. That issue has been fixed now and the intake and exhaust airflow in the room is good. You are definitely right about how hard it to stop the mold once it starts developing. It is unfortunate that some growers will try to sell the product even though there was mold issues. We feel this is not the right way to go about this. We initially tried to determine what was salvagable and what was mold infested but in the end we felt the same as you have stated. The mold had spread all over the place and the damage has been done already.
In order to prevent any future issues we are only working with one trusted clone company and we will have our partners start to grow from seeds. The new crop consists of clones and we will move everything over to growing from seeds the next round. It is true that most people selling clones and growing clones have no idea where they came from and how strong the genetics are. We want to take every precaution and make sure we have our growers bring out high quality products with strong genetics.