How to Grow Codonopsis Plants in your Garden

Gardener's HQ Guide to Growing Bonnet Bellflower and Deodeok

Codonopsis plants are a genus of hardy perennial climbers.

They may have either star or bell like flowers of blue, green, or yellow. These come into bloom in the summer.

Another name for a member of the Codonopsis genus is Bonnet bellflower.

Some Latin names include Codonopsis pilosula (Dangshen), Codonopsis lanceolata (Deodeok / Lance asiabell), and Codonopsis clematidea (Asian Bell Flower).

Codonopsis lanceolata
Codonopsis lanceolata by Y. K. Tarabagani.

Codonopsis mollis by Anniesannuals.

Codonopsis Growing and Care Guide

Common Names: Bonnet Bellflower, Deodeok.
Life Cycle: Hardy perennial
Height: 100 to 120 inches (250 to 300 cm).
Native: East Asia.
Family: Campanulaceae.

Growing Region: Zones 5 to 8.
Flowers: Summer.
Flower Details: Blue, green yellow. Bell-shaped. Five-points.
Foliage: Heart-shaped. Feathery. Variegated. Green. Bronze, White, Grey, Grey-blue.

Sow Outside: Surface. Middle of spring - before the last frost, or towards the end of autumn. Spacing 12 to 24 inches (30 to 60 cm).
Sow Inside: Germination time: one week to one month. Temperature 60 to 70°F (16 to 21°C). Use peat pots to grow Codonopsis in. Late winter. Transplant outdoors following the last frost.

Requirements: Full sunlight for best results can grow in partial shaded areas. Good drainage. Acidic soil, dry soil. Provide trellis. Heavy winter mulch. Propagate: by taking cuttings in the spring or autumn. Or dividing in the spring.
Miscellaneous: The roots of Codonopsis lanceolata (Bonnet Bellflower) are used in many Korean foods such as Deodeok Kimchi and Changui.

How to Grow Bonnet Bellflower (Codonopsis)

Seeds of Codonopsis can be planted out either before the last frost of spring or in the autumn. They should be sown on the surface. Ideally locate into a sunny part of the garden that has dry acidic soil.

If growing indoors, then seeds of bonnet bellflower should be sown into peat pots at the end of winter.

They take from one to four weeks to germinate, at a temperature of about 16 to 21 degrees centigrade (61 to 70°F).

Seedlings of Codonopsis should then be planted out after the last frost of spring. Space at about 50 cm apart (20 inches).

Caring for Codonopsis

Once established, the Codonopsis plant should be tied to a trellis.

I hope that you found this guide on how to grow Codonopsis plants in your garden. You may also enjoy my gardening guides on how to grow Rampion, Jasione plant, and Platycodon plants.