Garlic is a member of the allium family which also includes leeks, shallots and onions. Individual cloves act as seeds. The bulbs grow underground and the leaves shoot in to the air. Although garlic is traditionally thought of as a Mediterranean ingredient it is also grown successfully in colder more Northern climates.
Garlic is a very friendly plant and grows well planted with other flowers and vegetables. I have a group that grows in the flower bed by the patio, they were there when Will & I bought our home. I never have dug any up, I like them for their ornamental value. The flower heads are about 4" across and stand at about 6'.
USDA hardiness zone 6