Seed garlic is produced by speciality growers who are looking for the top graded crop, setting aside inferior bulbs for use as table garlic. Seed garlic growers select disease free, undamaged heads that are medium to large in size (too small and they yield weak bulbs the next season; too large and they are also inferior). In addition, seed garlic growers rejuvenate their stock on a regular basis, to ensure the unique characteristics of each strain remain true to type. This is done by growing new stock up from the tiny bulbils (mini garlic bulbs) that form at the end of garlic scapes, a process that takes up to five years but is also the only way to ensure varietal integrity over time.
Bulbils form at the end of the garlic scapes.