Castilleja alpicola prefers consistently moist soil, especially during its active growing season. Water thoroughly when the top centimeter of soil feels dry. Avoid waterlogging, as this can lead to root rot.

Reduce watering in winter when the plant is dormant.

Prune back spent flower stalks after blooming to encourage a tidier appearance and potentially a second flush of flowers. In late autumn or early spring, remove any dead or damaged foliage.

Light trimming can also be done to shape the plant if necessary.

Propagating Castilleja alpicola can be challenging due to its hemiparasitic nature. Seed propagation is possible but requires stratification.

Division of established plants in early spring is often the most successful method, ensuring each section has sufficient roots and shoots.

Repotting is generally not necessary for Castilleja alpicola unless it is in a container and has become severely root-bound. If repotting is required, do so in early spring before new growth begins.

Handle the roots with care, as they can be sensitive.