You mean if you leave it in from spring to the following spring? I don't think I would do it...I would harvest it as late in the fall as I could. Get some more and plant it in the fall, to harvest for next year. You might be able to use your own garlic for seed- depending how it looks. Good Luck!
A lot of people do plant it in the spring. But I agree with Lesa, harvest it in August or early September, dry it then plant the bigger cloves and eat the smaller ones. Tasty mistakes are the best.