Plant Profile: Senecio vulgaris

Common groundsel, a winter annual weed belonging to the Asteraceae family (commonly known as daisies), is often classified as a summer annual. However, this plant is capable of germinating in spring, summer, or fall. It thrives in cool, moist environments and can endure winter outdoors in milder climates or sheltered areas. Characterized by its lobed leaves and yellow flowers, common groundsel can produce flowers even when the plants are as short as 2 inches, with the potential to reach heights of 18 inches. Its seeds are dispersed by the wind and exhibit minimal dormancy, allowing for multiple generations to emerge within a single year. Notably, flowers can still mature and produce seeds even after manual weeding. To prevent seed production, it is advisable to avoid allowing the plants to flower. When introducing new transplants, it is essential to check liners and pots for any signs of infestation and eliminate them promptly to prevent further spread. Effective control of common groundsel can be achieved using preemergence broadleaf herbicides that are approved for use.

In terms of pests and diseases, a rust disease that originated in Europe has been unintentionally introduced and may pose a threat to local populations.