Verbascum nigrum
Dark Mullein
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Dark Mullein (Verbascum nigrum) - Description
Verbascum nigrum L. (Dark Mullein) is a species of biennial or short-lived perennial herbaceous plants in the genus Verbascum (mullein), native to dry open sites in Europe and the Mediterranean region. It grows to 0. 5-1. 5 m.
Dark Mullein (Verbascum nigrum) - Blooming
Flowers in the summer with spikes of clustered, often stemless flowers that are around 1 inch across. Usually yellow in color, but sometimes come in purple, red, or white.
Dark Mullein (Verbascum nigrum) - Growth
Biennials, a few annuals, perennials, and subshrubs. Does best with full sun. Foliage is covered with wooly hairs, which makes this genus of plants relatively distinct. Grows to 6 ft. tall for some species. Can become weedy especially the species V. thapsus. Grow alpine species in an alpine house to protect from winter moisture. Most Mulleins that are cultivated are hybrids. Hybrid and large species work well in a large, mixed or herbaceous border or gravel bed. Can also be naturalized in a wild or woodland garden. Smaller species like V. dumulosum and V. pestallozae make nice additions to a rock garden or alpine house.
Dark Mullein (Verbascum nigrum) - Planting
Self sows freely. Propagate seeds of biennials and perennials in late spring or early summer in containers in a cold frame. Biennials planted at 55-64°F (13-18°C)may flower and die in the first year. Can also propagate perennials by division in spring, or from root cuttings in winter. Semi-ripe cuttings work for shrubby plants; take in late summer.
Dark Mullein (Verbascum nigrum) - Pest
Caterpillars. Other issues include powdery mildew, and fungal leaf spots.
Dark Mullein (Verbascum nigrum) - Soil and irrigation
Needs alkaline, poor, well-draining soils.
