Polygonum persicaria, commonly known as Lady’s Thumb, is an annual herb that is native to a wide range of habitats in Eurasia, including moist fields, along streams, and in disturbed areas. It has become invasive in North America, where it can be found in similar environments. This plant typically grows up to 3 feet tall and features erect stems with swollen joints. The leaves are narrowly ovate and often display a characteristic brown or black spot in the center. From July to September, Lady’s Thumb produces dense spikes of tiny, showy pink flowers that are attractive to pollinators.

In cultivation, Polygonum persicaria is not commonly grown due to its invasive nature. However, it can be used in wildflower gardens or naturalized areas where its aggressive spread is not a concern. It prefers moist soils and can tolerate a range of conditions from full sun to partial shade. While it is not typically used for ornamental purposes, its ability to thrive in poor soil and its resistance to pests make it a low-maintenance plant. Gardeners should be cautious, as it can quickly become a weed in garden beds and lawns.CC BY-SA 4.0