What are the proper temperatures and humidity levels for cannabis crops?

What are the proper temperatures and humidity levels for cannabis crops?

Cannabis prefers a comfortable room temperature when grown indoors, or when it's slightly warmer - not too dry and not too wet. For many indoor growers, that's all you need to worry about. If you feel too hot or too cold in your grow area, it may be because the weather is too hot or too cold for your cannabis plants.

Ideal Temperatures for Marijuana

The optimal temperature for growing cannabis is usually between 68-77 degrees (20-25 degrees Celsius). If the ambient temperature around the plant falls below 20-25 degrees, the plant's growth will slow down and potential yields will be inhibited or even stopped altogether. As a result, the plant will never mature. It is important to note that the temperature at which the plant receives light during the "daytime" cycle is very important. This is when photosynthesis and growth potential come into play. In addition, the temperature should not change too much between day and night.

If the temperature of the plant exceeds 77 degrees Celsius (25 degrees Fahrenheit), the plant's metabolism speeds up. So it needs other elements: more light, more water, more carbon dioxide, more fertiliser etc. Be sure to adjust according to the temperature.

Plant Growth Stage : Young cannabis plants in the nutrient stage prefer warmer weather than the 70 to 85°F (20-30°C) of the flowering stage. Learn more about the timing of the vegetative growth phase.

FLOWERING PHASE : During the flowering phase (when cannabis plants begin to germinate), it's best to keep the surrounding weather at a temperature of 65 to 80°F (18-26°C) to produce optimal colour, trichome production and smell. For best results there should be a 10 degree difference between day and night. This is especially important to produce the highest quality branches during flowering.

Temperatures too low

When temperatures are near freezing, cannabis plants are too cold to be damaged. Cold weather tends to slow down growth. Temperatures below 60°F (15°C) tend to damage plant growth, and freezing temperatures can even kill cannabis plants.

Plants are more susceptible to certain types of mould when they are fresh, especially if they are also wet. Warm weather and large temperature swings lead to oversized leaves, which can also reduce photosynthesis.

Plants grown in relatively cold weather can survive, but will never grow as fast as they would at the right temperature. Indoor plants are more sensitive to cold than outdoor plants.

Temperatures that are too high

While cannabis plants don't usually die from high temperatures, high temperatures can cause plants to grow more slowly. Note that during flowering, temperatures above 80°F (26°C) will not only slow down branch growth, but also reduce branch potency and odour. It is especially important to control the room temperature during flowering!

Too hot

Cannabis is also more susceptible to a number of problems at higher temperatures, including mites, powdery mildew (especially when humid), root rot and nutrient burning (due to increased sweating of) water), increased stretching due to lack of oxygen in the roots, wilting and reduced "odour" in the buds (as terpenes can burn at higher temperatures).

Humidity

The ideal moisture level in a cannabis plant environment is between 40% and 70%. To measure humidity, you need a hygrometer. For most growers, an electronic hygrometer is probably the best option. It usually has an automatic feature that provides more control than humidity. This is always good for indoor culture.

Ambient humidity is an important factor (temperature can also be regulated)

If your plants are below -40% moisture, the plants will sweat faster. There will be no major consequences. Your plants will consume water faster. As long as there are enough water reserves, there is no problem. On the other hand, if the humidity is too high, your plants may grow mushrooms, especially during flowering. The contents will soon rot . You will definitely need to manually dehumidify to solve the mould problem and its consequences.

The Vrcoolertech AHU all-in-one unit is designed to quietly ventilate hydroponic grow rooms, promote room heating/cooling and circulate fresh air.

AHU stands for Air Handling Unit, and using an AHU in a cannabis greenhouse can help manage temperature, humidity, ventilation, and air quality to create the ideal environment for plant growth. Below are some of the applications of AHUs in cannabis greenhouses:

1. Temperature and humidity control: AHUs can be used to maintain temperature and humidity within appropriate ranges through heating, cooling and humidification systems. Temperature and humidity fluctuations in a greenhouse can affect cannabis growth, and using an AHU can help stabilise these environmental factors.

2. Ventilation: AHUs can provide the necessary ventilation to ensure the inflow of fresh air and the removal of dirty air. This is essential to prevent the spread of pests and diseases, maintain a healthy atmosphere, and promote the recycling of CO2 supply.

3. Air Filtration: AHUs can be equipped with an air filtration system that removes impurities, dust and microorganisms from the air. This helps provide a clean growing environment and reduces the risk of disease.

4. CO2 supply: AHUs can assist in distributing CO2 gas evenly throughout the greenhouse to promote plant photosynthesis and growth.

5. Energy efficiency: AHUs can improve energy efficiency through efficient energy utilisation by pre-treating outdoor air and delivering it to the greenhouse.

6. Data monitoring and control: Some advanced AHU systems feature data monitoring and remote control, allowing you to remotely monitor your greenhouse environment and make adjustments when needed.

When selecting and configuring an AHU, you need to consider the following factors:

- Size and layout of the greenhouse

- Ventilation needs and requirements

- Temperature and humidity range

- CO2 supply requirements

- Energy efficiency and control options