Airflow, Ventilation & CO2
Wind Burn
Wind burn is plant damage caused by excessive or direct airflow on cannabis leaves. It results in leaf curling, dryness, and physical stress symptoms.
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What Is Wind Burn?
Wind burn occurs when cannabis plants are exposed to strong or continuous direct airflow, typically from circulation fans positioned too close to the canopy. While airflow is essential for strengthening stems and preventing stagnant air pockets, excessive force can physically stress leaf tissue.
How Excessive Airflow Causes Leaf Dehydration
The primary cause of wind burn is mechanical dehydration. Intense airflow increases transpiration rates beyond what the roots can replenish, causing localized moisture loss. As a result, leaf edges may curl upward or downward, develop dry tips, or show brittle texture despite adequate watering.
How to Distinguish Wind Burn from Nutrient or Heat Stress
Wind burn is often mistaken for nutrient deficiency or heat stress because symptoms can appear similar. However, wind burn typically affects leaves directly in the path of airflow, while surrounding foliage remains unaffected. Identifying localized damage patterns helps distinguish it from systemic nutrient issues.
How Wind Burn Affects Stomatal Function and Growth
Excessive airflow can also interfere with normal stomatal function. When leaves lose moisture too rapidly, stomata may close to conserve water, reducing photosynthetic efficiency. Prolonged exposure may slow growth rate and weaken overall plant vigor.
How Proper Fan Placement Prevents Damage
Preventing wind burn involves proper fan placement and airflow management. Circulation fans should create gentle, indirect air movement that causes slight leaf movement rather than constant force. Oscillating fans are commonly used to distribute airflow evenly across the canopy.
Why Balanced Airflow Supports Healthy Development
Balanced airflow strengthens stems, reduces humidity buildup, and supports plant health when properly adjusted. Avoiding direct, high-speed airflow ensures plants benefit from circulation without experiencing mechanical stress or tissue damage.
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Airflow, Transpiration, Plant Stress, Heat Stress, Environmental Control, Turgor Pressure, Canopy Management, Growth Rate
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