Water Agalinis aspera regularly, especially during establishment and dry periods. Maintain consistently moist soil, but avoid waterlogging, as this can lead to root rot.

Allow the top centimeter of soil to dry slightly between waterings to ensure good aeration.

Pruning is generally not necessary for Agalinis aspera. However, dead or damaged stems can be removed at any time.

After flowering, you can trim back spent flower stalks to encourage a tidier appearance and potentially a second, smaller flush of blooms.

Propagation can be achieved through seed sowing. Start seeds indoors in late winter or early spring, or sow directly outdoors in autumn or early spring after a period of cold stratification.

Germination may be erratic and can take several weeks.

Repotting is typically only necessary if Agalinis aspera is grown in containers. As it is an annual or short-lived perennial, it may not need frequent repotting.

If repotting is required, do so in spring before new growth begins, using a well-draining potting mix.