Water regularly, allowing the soil to dry slightly between waterings. Ensure good drainage to prevent waterlogged roots, which can lead to root rot. In hotter, drier conditions, more frequent watering may be necessary.

Avoid overhead watering to minimize disease risk.

Deadhead spent flowers to encourage continuous blooming and prevent self-seeding if desired. Lightly trim back plants in late spring or early summer to maintain a more compact shape and promote bushier growth.

Remove any dead or damaged stems as needed.

Propagate from seeds sown in early spring, either directly outdoors or started indoors a few weeks prior. Seeds require light to germinate, so sow them on the surface of the soil.

It can also be propagated by cuttings taken in late spring or early summer.

Nuttallanthus canadensis is typically grown as an annual or short-lived perennial and does not require frequent repotting. If grown in containers and it becomes root-bound, repot in spring into a slightly larger pot with fresh, well-draining potting mix.