Water sparingly, allowing the soil to dry out completely between waterings. Overwatering is detrimental, leading to root rot. Reduce watering significantly during cooler, dormant periods to mimic natural dry spells.

Pruning is generally not necessary for Hyobanche robusta. Remove any dead or withered flower stalks if desired for aesthetic reasons, but avoid cutting into the main stem or leaves.

Propagation is primarily achieved through seeds, though it is challenging due to the plant's parasitic nature. Seeds require specific host plants and environmental conditions to germinate successfully.

Repotting is not applicable for Hyobanche robusta as it is a perennial root parasite that grows attached to a host plant. It is not grown in conventional pots.