Water regularly to keep the soil consistently moist, especially during dry spells. Avoid waterlogging, as Euthamia caroliniana prefers well-drained conditions.

Allow the top layer of soil to dry slightly between waterings in established plants.

Prune back flowering stems after they have finished blooming to encourage a tidier appearance and potentially a second flush of flowers. Cut back the entire plant in late winter or early spring to remove dead foliage and promote new growth from the base.

Slender goldentop can be propagated by division of established clumps in early spring or fall. Seeds can also be sown in spring, either indoors or directly outdoors after the last frost.

Stratification may improve germination rates.

Repotting is typically only necessary for container-grown plants, usually every 2-3 years or when the plant becomes root-bound. Spring is the ideal time to repot.

Use a well-draining potting mix and a pot that allows for adequate root space.