Giant Silver Mullien
Verbascum bombyciferum
Plant Details
USDA Plant Hardiness Zones:Â 4a-8b (9?)Â Â Find Your Zone
Plant Type:Â Biennial/PerennialÂ
Height at Maturity:Â Â Flower stalks up to 6′
Width at Maturity:Â 18-24″ or more
Spacing:Â Best as a specimen or 2.5 to 3′ apart for some space between plants
Spacing:Â Best as a specimen or 2.5 to 3′ apart for some space between plants
Growth Habit / Form:Â Clump / Rosette
Growth Rate:Â Moderate to Fast
Flower Color:Â Yellow
Flower Type:Â Â Single, on tall spikes
Flower Size:Â 1-2″, on tall spikes
Flowering Period:Â Summer
Flowering Period:Â Summer
Fragrant Flowers:Â No
Foliage Color:Â Silvery-Grey
Fragrant Foliage:Â No
Berries:Â No
Sun Needs:Â Full to Mostly Sun
Water Needs:Â Â Average, low when established
Soil Type:Â Clay (amended), Loam, Sand, Silt
Soil Drainage:Â Moist But Well-Drained to Dry When Established
Soil pH:Â 6.0 – 7.0
Maintenance / Care:Â Low
Attracts:Â Butterflies, Hummingbirds, Beneficial Pollinators, Visual attention
Resistances:Â Deer, Drought, Heat, Insect, Poor Soil, Rabbits
Description
Giant Silver Mullein is an architectural plant that makes a bold statement in the garden….one simply can’t miss it! The plant forms a rosette of very large silver-grey, felted leaves that are up to 2 feet in length. From this rosette rise tall, slender, felted, almost-white stalks adorned with pretty, sulfur-yellow flowers the bees, butterflies and hummingbirds will thank you for planting. A very attractive plant in the garden with color that brings out the best in other plants around it.Â
Landscape & Garden Uses
Growing up to 6 feet tall and 2 to 3 feet wide, Giant Silver Mullien is ideal for use as a specimen or in small grouping in sunny perennial borders that have well-drained soil. Can also be grown in large pots. A fine addition to butterfly and pollinator gardens, rock gardens, Xeriscape gardens and silver or yellow theme gardens.
Growing Preferences
Giant Silver Mullien is very easy to grow in a moist to somewhat dry well-drained soil and full to mostly sun. We suggest at least 6 hours of direct sunlight per day. Well-drained soil is essential! The plant will not tolerate constantly soggy or wet soils. During the season, spent flower stalks can be removed to encourage more new stalks. Though not a long-lived perennial (maybe 3 years), if you leave a few flower stalks at the end of the season the plant will self sow. Seedlings that appear may be easily moved and can be thinned to about 2 to 3 feet apart.Â
Note:Â Find helpful advice from our experts under the Planting & Care tabs above on desktop monitors or below on mobile phones.
Plant Long & Prosper!
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