Water Verbascum boerhavii thoroughly when the top 2-3 cm of soil feels dry. Avoid waterlogging, especially in cooler months.

Allow the soil to dry out slightly between waterings to promote strong root development and prevent root rot. Good drainage is crucial for this Mediterranean native.

Prune Verbascum boerhavii after flowering to encourage a tidier appearance and potentially a second bloom. Cut back flower stalks to the base of the plant.

Remove any dead, damaged, or diseased foliage throughout the growing season. This also helps prevent self-seeding if not desired.

Propagate Verbascum boerhavii by seeds sown in early spring or by basal cuttings taken in late spring. Seeds can be sown directly outdoors after the last frost or started indoors a few weeks prior.

Cuttings should be rooted in a well-draining, moist medium in a warm location.

Repotting is rarely necessary for Verbascum boerhavii as it prefers to be slightly pot-bound. If grown in a container, repot only when roots are clearly circling the pot, typically every 2-3 years.

Use a well-draining potting mix and move to a pot only one size larger.