How does humidity affect plant health in a greenhouse?

Humidity plays a critical role in the overall health and growth of plants within a greenhouse environment. High humidity levels can indeed encourage the development of certain fungal diseases, such as powdery mildew and botrytis, as these pathogens thrive in moist conditions. When humidity levels are excessive, the moisture on plant surfaces can create an ideal environment for these diseases to establish and spread.

Conversely, low humidity can lead to insufficient moisture in the air surrounding the plants, which can result in dehydration. Plants losing too much water through transpiration may not be able to take up enough moisture from the roots, leading to wilting and stress. This imbalance can negatively affect plant growth and vitality.

Therefore, maintaining a balanced humidity level is crucial for optimal plant health, helping to prevent diseases associated with high humidity while also ensuring that plants do not suffer from dehydration due to low humidity. This understanding of the relationship between humidity and plant health is essential for greenhouse management.