What effect does good air circulation have on ornamental plants?

Good air circulation plays a critical role in the health of ornamental plants primarily by helping to prevent fungal diseases. Fungi thrive in environments with high humidity and stagnant air, conditions that can often lead to issues such as powdery mildew, leaf spot, and root rot. When air flows freely around plants, it helps to reduce humidity levels around the leaves and surfaces where these pathogens might develop. This airflow also aids in drying wet foliage more quickly after rain or irrigation, further minimizing the risk of disease.

While humidity levels can influence plant health, increased air circulation does not directly increase humidity; in fact, it can lead to a decrease in localized humidity. Pollination is not negatively impacted by air circulation, as good airflow can actually facilitate the movement of pollinators. Lastly, air circulation does not promote soil compaction; rather, it often contributes to healthier root systems by ensuring good drainage and preventing standing water. Therefore, the primary benefit of good air circulation is its role in disease prevention.