Fill the containers with approximately 1 inch of gravel to aid in drainage. Fill the containers to the top with potting soil.
Pull apart the cloves making up the garlic bulb and select the largest bulbs for planting.
Plant a garlic clove in the center of each container with the pointed end facing up and the flat end facing down. Push the clove down into the potting soil to make it about 1 1/2 inches below the surface of the soil and tamp the soil down firmly above the clove.
Water the potting soil evenly after planting the garlic clove and place the container in a sunny window. Keep the soil evenly moist.
Fertilize the garlic plant twice each month by mixing the fertilizer with water according to package recommendations. Pour the fertilizer carefully over the soil.
Harvest the garlic when the foliage turns yellow approximately four to six months after planting the cloves. Gently lift the garlic bulb from the soil by grasping the leaves and pulling straight up.