How to Grow Dark Eyes Mullein
Wikimedia Commons
Dark Eyes Mullein
Verbascum nigrum 'Dark Eyes'
flowerDark Eyes Mullein is a striking biennial or short-lived perennial featuring tall spikes of bright yellow flowers with distinctive dark purple-black centers. This cottage garden classic grows 3-4 feet tall and produces delicate blooms that attract pollinators throughout summer. The plant is drought-tolerant, low-maintenance, and self-seeds readily in suitable conditions.
When should you plant Dark Eyes Mullein in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Dark Eyes Mullein timeline · Pittsburgh, PA (Zone 6b)
-
Plant Dark Eyes Mullein
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
First Dark Eyes Mullein blooms
Mid-to-late summerBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Dark Eyes Mullein dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 4-9, hardy to zone 3
Sign up free to see if Dark Eyes Mullein grows in your zone — and get a personalized planting timeline.
Get my Dark Eyes Mullein timeline →Growth Stages
Seed Germination & Seedling
2-3 weeksTiny seedlings with oval cotyledons emerge within 10-14 days. First true leaves are small and slightly fuzzy.
Keep soil lightly moist but not waterlogged. Provide bright light. Thin seedlings to proper spacing. Start indoors 6-8 weeks before last frost for faster blooming, or direct sow in fall.
Vegetative/Rosette Formation (Year 1 if Biennial)
6-8 weeks (remainder of first season if sown in spring)Plant develops a low rosette of large, gray-green, slightly fuzzy basal leaves. Minimal vertical growth occurs.
Water moderately; reduce watering as plant matures. No feeding needed on poor soil; light feeding only on very depleted soil. Remove weeds. Mulch lightly if in cold zones for winter protection.
Bolting & Stem Development
4-6 weeksA tall, sturdy central stem (3-4 feet) emerges from the rosette in spring of year 2 (or late spring of year 1 if fast variety). Stem is covered with fine, downy hairs.
Stake if in windy locations. Continue moderate watering during rapid growth. No fertilizer needed. Monitor for pests early in this stage.
Flowering
8-12 weeks or longerDense spikes of small (0.5-1 inch) yellow flowers with dark purple-black centers bloom sequentially from bottom to top. Multiple flowers open simultaneously along the spike.
Deadhead spent flowers to encourage continued blooming and prevent excessive self-seeding if desired. Water during dry spells. Enjoy pollinator activity. Can last 8-12 weeks or more.
Seed Pod Development & Decline
4-8 weeksFlowers fade and transition to round seed capsules. Plant begins to deteriorate after heavy frost or extended heat stress.
Allow some seed pods to mature if self-seeding is desired. Deadhead remainder to extend overall garden appearance. Water sparingly. Plant typically dies after seeding (biennial behavior).
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Hand-pick caterpillars; usually not severe. Accept minor damage or use neem oil if infestation is heavy.
-
Improve air circulation; avoid overhead watering. Apply sulfur dust or potassium bicarbonate fungicide if severe. Plant tolerates light mildew.
-
Increase humidity; spray foliage with water. Use miticide only if severely infested.
-
and
(on seedlings)
Handpick; use copper tape or sluggo around young plants. Mature plants are rarely troubled.
Uses
Edible Flowers
CulinaryThe delicate yellow flowers are mildly sweet and can garnish salads, desserts, or beverages for visual appeal and subtle flavor. [source]
Traditional Herbal Tea
MedicinalVerbascum species have a long history in folk medicine; flowers or leaves can be dried and brewed into a soothing tea traditionally used to support respiratory health. [source]
Cut & Dried Arrangements
CraftTall spikes dry beautifully and can be used in dried flower arrangements, wreaths, and crafts. Harvest when most flowers are open, then hang-dry in a cool, dark place. [source]
Pollinator Support
WildlifeAbundant flowers attract bees, butterflies, hoverflies, and other beneficial insects throughout the long blooming season, supporting garden ecology. [source]
Low-Maintenance Garden Design
HouseholdDrought-tolerant, pest-resistant, and minimal-care once established, making it ideal for xeriscape gardens, cottage gardens, and low-input landscapes. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
This is an ornamental flower; enjoy blooms on the plant for cut arrangements. Cut flower spikes when several flowers are open along the stem. For self-seeding, allow seed pods to dry on the plant and brown completely, then collect or let fall naturally. Seeds remain viable for 2+ years.
Fun Facts
- 🌱 The dark purple-black centers of 'Dark Eyes' are the defining feature of Verbascum nigrum, literally meaning 'black mullein' in Latin, distinguishing it from the common yellow mullein (V. thapsus).
- 🌱 Verbascum seeds can remain dormant in soil for decades, sometimes emerging unexpectedly years after the parent plant has died, making it a prolific volunteer in favorable conditions.
- 🌱 Historically, mullein leaves were dried and dipped in tallow or lard to create rushlights or torches due to their high oil content—a practice giving rise to the common name 'candlewick plant' or 'torches.'
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Dark Eyes Mullein planting timeline
Tell us your zip code and we'll calculate exactly when to start Dark Eyes Mullein seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Dark Eyes Mullein timeline →