Even this leather couch was the victim of mold after a water loss in an unoccupied home. Mold spores are everywhere, and they grow on any organic surface, given the right conditions. (Even leather) For growth, they require organic matter for food, moisture, warmth, and oxygen. To prevent mold growth, keep all surfaces clean and dry, and provide plenty of ventilation. If you have, or suspect you have a mold or moisture problem, Call the experts at SERVPRO of East Clackamas, Hood River & Wasco Counties.