Korean Angelica

If you want to grow Angelica gigas well, the single most important thing to understand is that the seed needs cold to wake up. Fresh seed sown in fall and left to overwinter outdoors gives you the best germination by a wide margin — old seed loses viability fast, so don't bother with packets that have been sitting around for a year. Sow it on the surface or barely covered, since it wants light, and be patient through a cold spell. Plant it in deep, rich, moisture-holding soil amended with plenty of compost; the most common mistake gardeners make is treating it like a drought-tolerant umbellifer and letting it bake. It's a biennial (sometimes a short-lived monocarpic perennial), so the first year is all leafy rosette and the dramatic dark wine-red domes come the second summer, after which the plant sets seed and dies. Let a few heads ripen and self-sow, or collect and re-sow promptly, and you'll keep a colony going indefinitely. Watch for aphids clustering on the developing umbels and for crown rot if drainage is poor in winter.

This is the species known as dang-gui or cham-dang-gui in Korean traditional medicine, where the root has long been used as a blood tonic and circulatory remedy — it's a close relative of the famous dong quai (Angelica sinensis) and is harvested in autumn of the second year for similar purposes. As always with medicinal roots, treat traditional uses as history rather than a prescription, and be cautious since angelicas contain furanocoumarins that can cause skin photosensitivity when you're handling the fresh plant in sun. On the culinary side the genus gives us the candied stems of European angelica, and while A. gigas is grown more as an ornamental and medicinal here, the young leaf stalks share that aromatic, faintly licorice-celery character of its cousins. It earns its place in the garden bed for the pollinators alone — bees and beneficial wasps absolutely cover those dark umbels in late summer.