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Gardening in the Rainy Zone.
GIANT SILVER MULLEIN
Pronounced: ver-BASS-cum bom-bih-SIH-feh-rum
Biennial or short-lived perennial.
Sunset zones: 2-11, 14-24.
USDA zones: 4-8.
Height: 8 feet (1.8 m). Width: 24 inches (60 cm).
Saucer shaped, deep yellow flowers.
Silver hairs cover the leaf giving it a soft felted feel to the ovate silver leaves.
Alkaline, poor, well-drained soil.
No fertilizer neccessary; lime can be used to sweeten the soil.
Surface sow seeds and germinate @ 55-64°F (13-18°C), keep in light. Germination in about 7-14 days.
Rainy Side Notes
This biennial starts out its first year as a pretty rosette of silver foliage. Each of the photos below helps illustrate a biennial plant life cycle.
During its second year the plant begins to elongate and form flower buds.
Flower buds begin opening.
The main flower stalk.
When the plant finishes flowering in its second year, it sets seed, completing its life cycle.
Photographed in author's garden.