In spring, wild leek bulbs replenish their nutrient reserves thanks to the abundant light at that time of year. The leaves then wither and decompose quickly.
The plant flowers in July and the seeds are released in early September.
Depending on weather conditions, the seeds that fall to the ground have roughly 50% chance of germinating. They go into dormancy for at least one year before germinating. Only a few (2 to 5%) of these plants grow from seeds reach sufficient size to reproduce, however.
Wild leek reproduces mainly vegetatively, i.e. by bulb division. The resulting plants are already larger and survive much better than those that grow from seed. In addition, after a few years, these plants are themselves ready to divide.