A 36" x 24" plant with lamb's ear-like leaves, a single tall flower spike, overwintering in zone 5 is likely common mullein (Verbascum thapsus). It's a biennial wildflower/weed with a rosette year one, flowering spike year two.
Considered a weed in some areas, a wildflower in others. Google Images for mullein.
Leaf Cleaners: Do Oils Clog Stomata or Attract Dust?
Identifying Verbascum (Mullein): Lamb's Ear Lookalike with Yellow Spikes
Diagnosing Yellow Leaves on Outdoor Hibiscus in California
Caring for Freshly Transplanted Daylilies in Autumn
Lamb's Ear (Stachys byzantina): Keep It Outdoors in Winter
Hardy Hibiscus Leaf Damage: General Insecticide or Targeted ID?
Caterpillars on Hibiscus and Peppers: Organic Bt Control
Drosera spatulata Seed Production and Digestion Time
Propagating Drosera capensis from Leaf Cuttings: Correct Method
Diagnosing Leathery, Darkening Leaves on Nepenthes 'Miranda'
Leaf of Life (Kalanchoe) Winter Care: Bring In Below 50°F
How Leaves Repel Water: A Science Project Guide
Identifying a Variegated Rubber Tree (Ficus elastica) and Fixing Leaf Curl
Copyright © www.100flowers.win Botanic Garden All Rights Reserved