Thermal Stress

Thermal stress in cannabis biology refers to the strain that cannabis plants experience when subjected to temperatures outside their optimal growing range. In the crucial stages of development, cannabis plants thrive within a specific temperature bracket – generally between 70°F and 85°F (21°C and 29°C) during the day and not falling below 60°F (15°C) at night.

When the ambient temperature veers beyond these limits, the plants may exhibit signs of thermal stress.

Effects of High Temperatures

High temperatures can lead to increased evapotranspiration rates, causing plants to lose water rapidly, and potentially leading to wilting, nutrient deficiencies, and reduced photosynthetic efficiency.

Effects of Low Temperatures

On the flip side, low temperatures can slow plant metabolism, resulting in stunted growth, poor root development, and delayed flowering. Moreover, exposure to cold temperatures can make cannabis plants more susceptible to mold and fungal infections.

Mitigating Thermal Stress

To mitigate thermal stress, growers must monitor and control environmental conditions rigorously. This involves employing climate control systems such as heaters, air conditioners, and proper ventilation to maintain a consistent temperature.

Implementing adequate insulation and utilizing thermal screens or shades can also be beneficial in buffering plants from temperature extremes. Managing thermal stress is crucial for ensuring the health of cannabis plants, optimizing their growth, and maximizing yield and potency.