Direct-seed in April. Like carrots, parsnips like deep soil and full sun. Plant seeds ½ inch deep and thin plants to 3-4 inches apart. They require a full season to grow, and their flavor improves with cooler temperatures. The sweetest roots can be dug after the fall frosts, and into the winter. Parsnips will overwinter outside as far north as zone 3, but dig them as soon as the soil is workable in the spring, or they will get woody as they start to bolt with the onset of warm weather. This wonderful variety was stewarded by Oatsplanter, and introduced to us by Ezra Sullivan.