Hi Rose,
I dont see why you couldn't.
I have never grown garlic, but it is my understanding it takes a whole season. Plant in the spring, and wait for it to die off in the fall, than harvest.

Have you grown it before?

Some form under ground some on top. Which kind you had in mind would determine the size pot.

JoJo

I grow Elephant Garlic (which is actually a leek, I think?) and a Red Garlic. Most I grow in ground, for ease; but they grow fine in containers.

In my area, we already planted our Garlic bulbs (the extras that we haven't planted have begun to send up sprouts).

The plants outside were buried under snow a couple times, too. I have a friend growing Garlic in a variety of containers - from half-barrels to coffee cans - and his main consideration is disturbance from squirrels and/or cats.

Before the flowers are fully opened, we behead the plants (leaving only the tall stalk).

Generally, we harvest when the stalks have begun to dry down to the bulb.

Josh