perennial

Black Mullein

The Story

Plant Bio

Verbascum nigrum, commonly known as Black Mullein, is a biennial or short-lived perennial distinguished by its tall, erect flower spikes and soft, woolly, grey-green leaves, producing clusters of small, yellow flowers.

This species is valued for its drought tolerance and ability to thrive in poor soils, making it a resilient choice for naturalistic and low-maintenance gardens.

Uses & Benefits:

Striking tall spikes add vertical interest, especially in native or drought gardens.

Provides erosion control on slopes due to deep root systems.

Supports pollinators like bees and butterflies.

Essentials

At a Glance

Plant Type

Perennial

Height

36 inches

Width

24 inches

Light

Full Sun

Zones

5, 6, 7, 8

Water

Low

Humidity

Low to moderate

Lifespan

Perennial

Native To

Europe and Asia

Toxicity

Non-toxic to humans and pets

Bloom period

Summer – Late fall

In flower about 5 months of the year

Planting

How to Grow

Tuck seeds on soil surface in early spring
Mist cuttings regularly to maintain humidity
Transplant seedlings after last frost, about 6 weeks
Water regularly until established
Fertilize lightly in spring with balanced fertilizer
Divide clumps every 3-4 years in early spring

Pro Tip

Plant in well-drained soil with full sun for best growth.

Keep It Thriving

Care Guide

Do

Water sparingly once established 💧
Prune after flowering to promote bushiness
Mulch to retain moisture and suppress weeds
Fertilize lightly in early spring

Don't

Overwater, avoid soggy soil ❌
Don’t prune in late fall
Avoid heavy fertilization which can cause legginess

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Spring Cleanup
Stake

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Drought-tolerant borderVertical accent in perennial bedsWildflower meadow

Companion Plants

Salvia EchinaceaLavender Yarrow Coreopsis

Multiply

Propagation Methods

Good to Know

Common Questions

Black Mullein questions

What zones can Black Mullein grow in?

Black Mullein is hardy in USDA Zones 5–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Black Mullein deer resistant?

Yes — Black Mullein is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Black Mullein bloom?

Black Mullein typically blooms in summer through late fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Black Mullein need full sun?

Black Mullein does best in full sun (6+ hours).

Is Black Mullein drought tolerant?

Yes — once established (usually after the first full season), Black Mullein handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.