Angelica gigas

PHOTOS BY MARK DWYER

Whenever I’ve grown or stumbled upon Korean angelica (Angelica gigas) in any garden, I’m constantly drawn to the statuesque presence of this stately architectural plant. I don’t think I’ve ever NOT photographed this plant when in bloom as it not only has an intense ornamental quality but attracts a wide range of interesting pollinators. Reaching a mature height of 5-6 feet, placement of this plant as a focal point and feature should be considered. When in bloom in later summer (late July into September), the hemispherical, dark, reddish purple flower umbels (4-8 inches in diameter) are numerous, beautiful and bold. Native to forest edges, grasslands and river edges in Korea, China and Japan, this plant (Apiacea family) is considered a short-lived perennial (Zones 4-8) or more frequently is recognized and utilized as a biennial (two years until bloom). Korean angelica also has a long history in traditional Chinese medicine (roots).

Rich soils with organic material are recommended in areas of full or part sun. While pH adaptable, this plant can also tolerate clay soils although suitable drainage is important. The broad, bold, dissected leaves emerge early followed by reddish purple stems that extend quickly and later support huge buds. These numerous buds will start opening in late July to reveal amazing, spherical, domed flowers of the deepest wine-purple tone. These broad umbels are covered in sweet beads of nectar that will attract a wide and diverse range of nectar-hungry bees, butterflies and wasps. In my area of southern Wisconsin, I notice them covered in great black wasps (Sphex pensylvanicus) which while intimidating in appearance, are solely focused on the nectar buffet.

The impressive flowering period can extend for a solid four weeks with interesting seed capsules forming later. Ideally, leave this biennial to reseed in the garden and later cull or move first year seedlings the following year as desired. Transplanting seedlings in desirable locations when plants are small is ideal for establishment as there is a notably low germination rate for seeds. Occasional insect and disease issues may arise but happy and healthy plants exhibit few if any problems.

Why grow Angelica gigas?

• Dark, wine-purple, domed flower umbels for many weeks
• Strong and bold architectural presence in the landscape
• Amazing plant for diverse range of pollinators
• Deer resistant