Proper greenhouse ventilation during winter months helps to prevent excessive humidity, mold, and pests. Even in winter, air circulation is necessary to remove excess moisture and ensure fresh air reaches plants. One effective method is using adjustable roof vents or sidewall openings that can be controlled to regulate airflow based on temperature and humidity levels.
Passive ventilation can help, but in colder climates, it’s important to avoid letting cold drafts directly affect plants. Installing small circulation fans can improve airflow without significantly lowering the temperature. Monitoring humidity levels with a hygrometer helps determine when ventilation is needed. During particularly cold nights, it’s helpful to keep vents closed to conserve heat but open them slightly during the day when temperatures rise to promote airflow.
