1. Humidity indoors is a direct result when hot air comes in contact with a cool surface and water condenses to form dew. Indoor humidity should ultimately be reduced to between 30 percent and 60 percent to decrease black mold growth. No wonder you're looking at this title twice. Keep in mind that mold can start to develop between 24 and 48 hours of a material getting wet. Where Does Mold Grow. This type of mold can be closely identified by its musty smell that will emanate inside of the environment. Mold can be washed away with detergent and water on hard surfaces, which must then be dried quickly and completely, while ceiling tiles and carpet can absorb black mold and may require replacement. Organic items (food source) include furniture, clothing and construction materials. Mold Thrives in Humidity. Mold can happen from in the vegetative stage, flowering stage and even during the drying and curing of buds. You’ll have to have methods in place to remove moisture from the air like a dehumidifier and exhaust fan, as well as control temperature and the amount of organic material present to prevent mold growth. Ideally, the relative humidity of your grow room should be lowered to around 40-50% at the beginning of the flowering stage. It makes them unsafe to smoke, slowly starts killing your plant and can easily infect other plants in the grow room. What Does Mold Need to Grow? If you don’t know what the relative humidity is in your home during the summer months, an easy and inexpensive way to check is to purchase a hygrometer (about $10 at your local hardware store) and check your humidity levels. There are three common factors that mold needs to grow: moisture, nutrients, and time. The mold spores (as well as any contaminated materials) need to be eradicated if you don’t want the mold to grow back. To stop mold at its source, you will need to eliminate the substance that allows it to grow in the first place: water. Mold growth is one of the things you’ll want to prevent when maintaining your property. They told me that they have read an article that said that molds grow in cold temperatures. Now, here are five tips to help you keep total control of the humidity in your grow room. Humidity can be reduced with a dehumidifier, an open window, or a good ventilation system with a ceiling vent. Black mold on walls grows fast. But there it is, on a concrete floor, wall, patio or walkway. That is why it is not enough to simply eliminate humidity if you have an active mold problem. Leaky Pipes. Recently I've been told by my parents to turn my room heater on. Humidity is a common occurance in many homes in the PNW, and with humidity comes the potential for mold growth. When mold spores encounter a damp surface, they plant themselves and immediately begin to grow. If this level of humidity is regulated for a certain about of time (approximately 1 week), the spores will be deprived of moisture and everything should air out. Learn how we can prevent the spread of mold in your home. The mold spores will stay dormant and start growing again if not treated by professional mold remediation techniques. Mold In RV's. As long as moisture is available, mold will continue to grow expanding from one surface to another. If you can smell mold in your home or you have had wet building materials for more than 72 hours, then it may be time to call the professionals at Mold Solutions. Ideal grow tent temperature and humidity levels can vary depending on the plant you’re growing, but we generally suggest keeping a grow tent within these ranges:. This confused me, because I know that molds grow on hot temperature and on a humid day but not on a cold temperature and low humidity (inside house).