Cephalaria is a hardy perennial. It is large and can flower up to 2m (7 feet) in height.
Cephalaria has the common name of Scabious.
It flowers in the summer with yellow cup-shaped flowers.
As it is a large plant Cephalaria should be grown at the back of borders.
Cephalaria gigantea by Leonora Enking.
Cephalaria by Sharon K.
Common Names: Cephalaria, Scabious
Life Cycle: Hardy perennial
Height: 32 to 80 inches (80 to 200 cm).
Native: Europe, Asia, Africa.
Growing Region: Zones 3 to 9.
Flower Details: Yellow, cream. Cup-shaped.
Foliage: Herbaceous. Ovate. Opposite. Dark Green.
Sow Outside: Seeds: 1/4 inch (6 mm). Spring. Spacing 24 to 36 inches (60 to 90 cm).
Sow Inside: Germination time: 3 weeks to 2 months. Temperature 55 to 65°F (13 to 18°C). Late winter. Transplant outdoors following the last frost.
Requirements: Full sunlight or partial shade. Cephalaria grows in most soils; best results in moist and poorer soil. Regular watering. Provide support. Cut back once flowering has completed. Divide after two or three years to maintain vigour. Propagate: by dividing at the beginning of spring.
Miscellaneous: Attracts bumble bees, moths, and butterflies.
If planning to grow Cephalaria plants outdoors from seeds, then they should be sown at a depth of 7 mm in the spring.
They prefer a partially shaded or sunny area of the garden that has moist soil.
If you are planning to first grow seedlings indoors then they should be started towards the end of winter. They take around three to eight weeks to germinate at about 15 degrees Celsius (59°F). Seeds that do not germinate can be advanced by subjecting them to three weeks or so of stratification in a refrigerator.
Scabious should be planted outside with a spacing of about 60 to 80 cm (24 to 31 inches).
Cephalaria are easy to look after but do require regular watering.
Due to their height Cephalaria plants should be staked in windy areas.
Once flowering has finished, they should be cut back, and every three years the plant should be divided to maintain vigour.
If proagating, then dividing the plant is also a good way of producing further Cephalaria plants, and should be done in the spring.