Veronica serpyllifolia, commonly known as thyme-leaved speedwell or thymeleaf speedwell, is a perennial herb native to Europe and widely naturalized elsewhere. It typically inhabits open woodlands, meadows, and grassy slopes, favoring moist, well-drained soils. This species is often found at elevations up to 10,827 feet (3,300 meters). Thyme-leaved speedwell forms low, dense mats of foliage with creeping stems that can root at the nodes. The plant features small, oval to lance-shaped leaves and produces upright flowering stems that can reach up to 8 inches high. From spring to early summer, it bears delicate white flowers with dark purple lines, which are attractive to a variety of pollinators, including flies and bees.

In cultivation, thyme-leaved speedwell is valued for its ground-covering ability and charming flowers. It is suitable for rock gardens, borders, and as an underplanting for taller perennials. This plant is easy to maintain, requiring minimal care once established. It prefers full sun to partial shade and thrives in moist, well-drained soils. While it is considered a weed in some regions, particularly in North America, its non-invasive nature makes it a manageable addition to gardens. However, it can become aggressive in lawns and turf grass, where it is often unwelcome.CC BY-SA 4.0