LIGHT
You already know your plants need light, but in a grow room there’s more to it than just sticking a light over your plants. The amount of light you provide determines your yields and different plants require different types of light. For larger, energy-hungry flowering plants choose HID lights.
For smaller plants, seedlings or clones choose CFL lights and for propagation and supplementary lighting, choose LEDs.
HPS and CMH lights give more light output and provide plants with a wide lighting spectrum for incredible growth. The downside to using higher light intensity lighting is it increases heat output, affecting the temperature of the grow room. If this isn’t managed, the temperature around the light source will be warmer than in the other areas, affecting the overall grow room temperature.
TEMPERATURE
Most plants will grow most effectively at a temperature of around 28°C, which is the ideal temperature. When lights are on it’s easy to maintain this sort of temperature as there is a consistent source of heat and light. However, during warmer weather, temperature management can be a bit tougher. During dark hours when temperatures are cooler you may need an additional heat source.
It’s important to keep the difference between day and night temperatures as low as possible. If temperatures become too high, you can use an extractor fan to reduce temperatures and maintain air flow. When your lights are off, temperatures can decline, so it’s important to keep control of both day and night cycles. That’s where climate controllers come in! Rhino Silent Fan Controllers control your grow room temperature, adjusting fan speeds to achieve a set temperature.
HUMIDITY
Humidity is relative to temperature, so when temperature goes down, humidity goes up, and vice versa. Fluctuations impact plant growth and create unstable environments where mold and mildew can take hold.
Humidity rising above 60% can lead to molds, mildews, and other unwanted biological growth.
High humidity prevents plants from properly taking in CO2, preventing efficient photosynthesis. In this case, a dehumidifier can be used to lower the humidity to an appropriate level. Humidity falling below 30% can lead to reduced transpiration capabilities, which slows growth and prevents efficient photosynthesis. In this case, a humidifier can be used to raise the humidity to an appropriate level.