In early to late Spring, sow seeds 1″ apart and 1/2″deep in well worked, fertile soil in full sun. Keep evenly moist as parsnips seeds germinate slowly and unevenly. When seedlings are large enough to handle, carefully thin to 4-6″ apart so roots have room to size up. Keep growing parsnips moist and well weeded and fertilize monthly. Harvest late fall; flavor is enhanced by cold weather especially after frost.