They're not important economically. But you can usually find small quantities in the supermarket produce section. Leeks Leeks don't form bulbs like other alliums do. The leaves wrap around each other to form a pseudostem, or false stem. This results in a thick stem with leaves attached in much the same way as corn.
Elephant garlic is related to leeks.
A handful of farmers grow it commercially on a very few acres in Georgia. These plants, also called great-headed garlic, grow much like leeks, to which they are related. The bulb these plants form looks like a large garlic. In fact, a single clove of elephant garlic can be the size of an entire bulb of regular garlic. The flavor is much like garlic, but milder.