Zwolle Curled Celery (Zwolsche Krul)
Apium graveloens
Also known as Curley Leaf Smallage, this rare 1800s soup celery
from Zwolle in the Netherlands is considered an heirloom classic. A hardy biennial, it will overwinter with straw protection although best for cold-frame culture. Basically, the same cultural requirements as parsley. Minimum 50 seeds. Germination 97%.