Heat stress

Heat stress is a condition where cannabis plants experience damage due to excessive heat exposure.

Also called / Category:

Overheating, Heat damage / Pests, Pathogens & Disorders

Key takeaways:

• Heat stress can inhibit cannabis plant growth.
• Common signs include wilting, leaf curling, and yellowing.
• Occurs mostly in indoor grows with poor ventilation.
• Can lead to reduced yield and offset-4 transition-colors hover:underline" title="Learn more about Potency">potency.

What it is / How it shows up:

Heat stress is commonly mentioned in cannabis cultivation guides and grower forums. It affects cannabis plants by causing physical symptoms like wilting, leaf curling, and yellowing. These signs occur when the plant's environment is too hot, often due to insufficient air circulation, high-intensity lights, or outdoor heat waves. If not mitigated, heat stress can stunt growth and decrease the quality and quantity of the harvest. Ensuring adequate ventilation and proper light distance can help prevent this issue.

How it’s measured or identified:

• Visual inspection of leaves for curling.
• Monitoring plant wilting and yellowing.
• Checking ambient temperature and humidity levels.

Use in context:

• "My plants are showing signs of heat stress with curled leaves."
• "Ensure your grow tent has proper ventilation to avoid heat stress."
• "The recent heatwave caused some heat stress in my outdoor cannabis garden."

Safety & compliance in Canada:

• Ensure compliance with local regulations for indoor growing environments.
• Follow Health Canada's guidelines for safe cannabis cultivation practices.

Related terms / See also:

• Air exchange
• Aeroponics
• Aphids
• Beneficial microbes
• Apical meristem

FAQs:

What are the main signs of heat stress in cannabis?

The main signs include wilting, leaf curling, yellowing leaves, and brown edges. These symptoms indicate that the plant is struggling with high temperatures.

How can I prevent heat stress in my cannabis plants?

To prevent heat stress, ensure good air circulation, maintain optimal temperature, and adjust lighting to avoid excessive heat exposure.

Sources:

• Health Canada
• PubChem