What is the right temperature and humidity for the cannabis crop?

Beginner’s Guide: Temperatures for the Best Cannabis Crops

Cannabis likes a comfortable room temperature when grown indoors, or when it’s a little warmer – not too dry and not too humid. For many indoor growers, that’s all you need to worry about. If you are feeling too hot or too cold for yourself in the growing area, it may be because the weather is too hot or too cold for your cannabis plant.

Ideal temperature for cannabis

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 growth of the plant will slow down and potential yields will be inhibited or even stopped altogether. As a result, the plants never mature. It is important to note that during the “day” cycle, the temperature at which plants get light is very important. This is when photosynthesis and growth potential come into play. Also, the temperature should not change much between day and night.

If the temperature of the plant exceeds 77 degrees Celsius (25 degrees Celsius), the metabolism of the plant will speed up. So it will require other elements: more light, more water, more carbon dioxide and more fertilizer, etc. Be sure to adjust for changes based on temperature.

In other words, the ideal temperature

It is wise to not only invest in thermometers, but also install thermometers on ventilation or heating systems to automatically manage the temperature in the grow room. The automatic system also provides good ventilation for fresh air and avoids carbon dioxide starvation.

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

Flowering Period: During the flowering period (when the cannabis plant begins to sprout), it is best to keep the surrounding weather slightly cooler at 65 to 80°F (18-26°C) to produce the best color, trichome production and smell. For best results, there should be a 10-degree difference between day and night. This is especially important for the development of the highest quality shoots during flowering.

Temperature is too low

When the temperature is near freezing, it is too cold for the cannabis plant to be damaged. Cold weather tends to slow growth. Temperatures below 60°F (15°C) tend to destroy the growth of plants and freezing temperatures chocent even kill cannabis plants.

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

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

Temperature is too high

Although marijuana plants usually don’t die from heat, high temperatures can cause plants to grow more slowly. Note that during flowering, temperatures above 26°C (80°F) will not only slow shoot growth, but also reduce shoot potency and smell. During the flowering period, controlling the room temperature is especially important!

too hot…

Cannabis is also more susceptible to a number of problems in high heat, including mites, powdery mildew (especially when it’s wet), root rot, and nutrient burning (due to increased sweating). water), increased stretching, wilting due to lack of oxygen in the roots and reduced “smell” in the shoots (since terpenes can burn at higher temperatures).

Humidity

The ideal moisture in a cannabis plant environment is between 40, 70%. To measure humidity, you need a hygrometer. An electric hygrometer is probably the best option for most growers. It usually has an automatic function that provides more control than just humidity. It’s always good for indoor culture.

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

If your plant’s moisture is below -40%, the plant will have an accelerated perspiration rate. There will be no major consequences. Your plant will consume water faster. As long as there is an adequate water reserve, there is no problem. On the other hand, if the humidity is too high, your plant may have mushrooms, especially during flowering. The stuff in there rots quickly…you definitely need to dehumidify manually to fix the mold problem and the consequences of that.

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