Euthamia caroliniana (Slender Goldentop)

Euthamia caroliniana is a low and fine-textured plant with grass-like leaves and clusters of small yellow flowers that bloom late in the growing season. It has many common names, such as Slender Goldentop, Carolina Grassyleaf Goldenrod, or Coastal Plain Grassyleaf Goldenrod. It’s often confused with goldenrods as it blooms around the same time, similarly with small bright clusters of yellow flowers.

While Euthamia was once categorized among Solidago (goldenrods), the airy, plume-like foliage, branching flat-topped flowers, and its preference for moist areas help to distinguish it. 

Slender goldentop tolerates a range of soil conditions, but prefers moist or seasonally damp areas with sandy soil, where it will spread via rhizomes and reseeding to form small colonies. Its preference for wet areas, its shorter stature and ability to fill space make it an excellent species for moist meadows, rain gardens, ditches, and areas surrounging ponds or drainage sites. With help getting established it is adaptable to average soil moisture, particularly in part sun settings. 

Euthamia caroliniana provides late-season nectar and pollen for bees and other native insects, which can be critical as floral resources diminish into autumn. It also serves as a host plant for several moth species. The spent flowers turn to fluffy plumes of seeds, which are sometimes fed on by small birds.

This species pairs well with other same-sized moisture-adapted perennials, such as Eupatorium pilosum (Rough boneset), Eupatorium rotundifolium (Roundleaf boneset), Conoclinium coelestinum (Blue mistflower), and native grasses such as Andropogon virginicus (Broomsedge) and Andropogon glomeratus (Bushy bluestem). Due to its strong presence, it is best planted with plants that can take a little competition.