Large five petaled yellow blooms appear in late summer.
image by amandabhrslater:Flickr.com
Verbascum (Verbascum thapsus) is biennial herb that was introduced to the United States in the 1700's. Some consider it a weed and others use it in their herb garden for décor and medicinal purposes. It is commonly referred to as mullein. Verbascum has a life span of two years. In its first year of growth it is a small rosette-shaped plant with blue-green leaves. The next year it grows to a tall, thick spike that has yellow blooms.
Mix compost into soil thoroughly. Sow seeds after the danger of frost has past. Cover the seeds with soil and water lightly, just enough to moisten the soil. Seeds should begin to germinate in two to three weeks.
Mulch lightly around the plants once they have begun to mature. Water regularly, making sure to keep soil moist. Do not overwater; this will cause the root system to rot. Remove yellowed and or dead leaves to encourage new growth.
Prepare Verbascum for winter by cutting back leaves to just above the soil. Cover with mulch to protect the root stock from freezing temperatures. Next spring uncover and water thoroughly to encourage new growth. Flowers can be picked and added to potpourri for a light fragrance.