👉 Heather fumes refer to the strong, often unpleasant odor released by heather plants, particularly those in the genus Calluna. This odor is primarily due to volatile organic compounds like terpenes and phenols, which can become more pronounced in dry conditions or when the plant material is disturbed. These fumes can be irritating to the respiratory system and may cause headaches, nausea, or dizziness in sensitive individuals. While heather fumes are a natural byproduct of the plant's chemical composition, they can also indicate environmental stress, such as drought or poor soil quality, making them a useful indicator for gardeners and ecologists alike.
