cheapest way to grow garlic from a clove?

Supermarket garlic can work, but some of it is imported from much warmer places and won't bulb well, and some is treated to stop sprouting. Garlic from a farmers market grown near you is a safer bet and not much dearer. Plant in autumn, pointed end up, about 2 inches down and 6 apart, mulch over winter. Harvest next summer once the lower few leaves have gone brown.