Temperature is one of the most important things the grower must watch with their crop of pot, because the plants can be slowed in growing due to high temperatures and low temperatures can cause weak plants. The temperature that is most successful for having weed that grows to its full potential and is a quality harvest is about 68 degrees or 20 Celsius. This means that the pot plants should not be set directly on a cold floor or that with the heat of the lighting that a fan will need to be used. There is also the fact that if the growing area is above 75 degrees it is a breeding ground for bugs and then there is the fact that the cool weather of winter might require the grower to use a heater. This is because during the hours that the lights are shut off for the plants the temperature will drop quickly. During warmer weather when a fan is in use do not place it so it directly blows on the plants, because this can cause them to concentrate on growing a thicker stem, and that means they are not growing leaves, buds and producing as much THC as they could.