Verbascum

Description

Verbascum, also known as mullein, is a genus of flowering plants that belongs to the Scrophulariaceae family. There are more than 300 species of Verbascum, most of which are native to Europe and Asia. The plants are biennial or perennial and can grow up to six feet tall. They have a rosette of large leaves at the base of the plant, and a tall spike of flowers that blooms in the summer.

Taxonomic Information

Appearance

Verbascum plants have large, woolly leaves that form a rosette at the base of the plant. The leaves are typically green, but some species have leaves with a bluish or grayish tint. The flowers are arranged in a tall spike that can reach up to six feet in height. The flowers are typically yellow, but some species have flowers that are white, pink, or purple. The flowers have five petals and are symmetrical. The plants bloom in the summer and can be used as ornamental plants in gardens.

Care Guide

Verbascum plants are relatively easy to care for and require minimal maintenance. Here are some tips for caring for your Verbascum plant:

Water: Verbascum plants prefer well-drained soil and do not like to be over-watered. Water your plant deeply once a week, but allow the soil to dry out slightly between waterings.

Fertilization: Verbascum plants do not require much fertilizer, but you can apply a general-purpose fertilizer once a month during the growing season to encourage healthy growth.

Soil: Verbascum plants prefer well-drained soil that is slightly acidic. If your soil is heavy or clay-like, you can add sand or peat moss to improve drainage.

Sunlight: Verbascum plants require full sun to thrive. Make sure that your plant receives at least six hours of direct sunlight each day.

Hardiness Zones: Verbascum plants are hardy in USDA zones 4-9.

Common Pests & Diseases

Verbascum plants are relatively resistant to pests and diseases, but they can be affected by some common problems.

Pests: Verbascum plants can be attacked by aphids, spider mites, and thrips. To control these pests, you can spray your plant with insecticidal soap or neem oil.

Diseases: Verbascum plants can be affected by fungal diseases such as powdery mildew and rust. To prevent these diseases, make sure that your plant has good air circulation and avoid overhead watering.

Habitat

Verbascum plants are native to Europe and Asia, but they have been introduced to other parts of the world as ornamental plants. They grow in a variety of habitats, including meadows, pastures, and along roadsides. Some species of Verbascum can tolerate dry, rocky soils and are often found growing on hillsides and cliffs.

Questions and Answers

Q: Can Verbascum plants be grown in containers?

A: Yes, Verbascum plants can be grown in containers as long as the container is at least 12 inches deep and has good drainage.

Q: How often should I fertilize my Verbascum plant?

A: You can apply a general-purpose fertilizer once a month during the growing season to encourage healthy growth.

Q: How do I prune my Verbascum plant?

A: You can deadhead your Verbascum plant by removing the spent flowers. If your plant becomes too leggy, you can cut it back to encourage bushier growth.

Q: Can I propagate my Verbascum plant?

A: Yes, you can propagate your Verbascum plant by taking stem cuttings in the summer or by dividing the plant in the spring.

Related Plants

Here are some related plants that you might be interested in:

• Digitalis
• Lupinus
• Echinacea
• Rudbeckia
• Achillea

References

• “Verbascum.” Wikipedia, Wikimedia Foundation, 19 Feb. 2022, en.wikipedia.org/wiki/Verbascum.
• Dirr, Michael A. Dirr’s Encyclopedia of Trees and Shrubs. Timber Press, 2011.
• Armitage, Allan M. Armitage’s Garden Perennials. Timber Press, 2011.