A picture of a Nettle-Leaved Mullein

Nettle-Leaved Mullein

Verbascum chaixii

Also known as

Nettle-Leaf Mullein

Verbascum 7 by Penarc (CC BY 3.0)

Full Sun
Easy care
Light watering
Frost Hardy

H5

RHS hardiness

-15°C

Minimum temperature

Expected size

Height
Spread

1m

Max

60cm

70cm

Min

30cm

6 months to reach maturity

Flowering

  • spring
  • summer
  • autumn
  • winter

This plant has no fragrance

More images of Nettle-Leaved Mullein

Verbascum chaixii subsp. austriacum (8455479329)
Verbascum chaixii subsp. austriacum sl6
A photo of Nettle-Leaved Mullein

Nettle-Leaved Mullein Overview

Verbascum chaisii is a short-lived, semi-evergreen perennial which is often treated as an annual. It grows up to 1m in height from a basal rosette of grey-green hairy leaves. The flowers are produced in spikes of pale yellow flowers with contrasting purple centres. Commonly known as Nettle-Leaved Mullein, it prefers a light alkaline soil with sun and good drainage and is ideal for including in informal cottage style mixed borders, giving height and interest. Although short lived it will self-sow replacements readily. This species is part of the RHS “Plants for Pollinators” initiative to showcase plants which support pollinator populations by providing ample amounts of nectar and/ or pollen. A great choice for encouraging pollinating insect wildlife into your garden!

Common problems with Nettle-Leaved Mullein

How to harvest Nettle-Leaved Mullein

Flower spikes can be cut for floral arrangements as required. Collect seed in autumn once the seed heads have ripened. Store in paper bags or envelopes in cool dry conditions for use the next year.

How to propagate Nettle-Leaved Mullein

Cuttings

In late autumn or early winter while the plant is dormant. Lift the whole root ball and wash the roots free of soil. Select pencil thick roots - a total of a third of the root ball - and cut away as close to the crown as possible. Cut away any fibrous lateral roots and the thin end of the root leaving a section between 5 - 10 cm (2-4") in length. When cutting the thin end away, make an angled cut to insure the cutting is planted the right way. up. Using a gritty free draining compost insert the cuttings 4cm (2") apart with the top of the cutting just below the surface of the compost. A top dressing of grit (1cm 3/8") can be added. Water lightly and place the pot in a cool location such as a cold frame or unheated greenhouse. Pot on into individual pots the following spring when they produce signs of growth.

Seed

Verbascum self-seeds readily, however young seedlings need to be moved in early autumn before they develop deep tap roots which do not like being disturbed. These seedlings may not produce the same flowers as their parents. Sow collected seeds in April or May into trays of pre watered seed compost. Maintain the temperature at 15º-18ºC out of direct sunlight. Germination should take between 14 to 30 days. Prick-out seedlings as soon as they are large enough to handle into individual pots and grow on in cool conditions. Plant out when the roots reach the bottom of the pot into their final position.

Special features of Nettle-Leaved Mullein

Attractive flowers

Attracts useful insects

Drought resistant

Other uses of Nettle-Leaved Mullein

These drought resistant plants suit being included in gravel and dry gardens as well as informal cottage garden mixed borders and wildlife friendly spaces.