The thick, wedge-shaped roots make preparing these parsnips a breeze—and as for the flavor, it's extra sweet with a complex flavor. All American Hybrid Parsnip produces high yields of uniform, creamy white, wedge-shaped roots that are 3 inches across and 10-12 inches long. They're wonderful roasted, but can also be cooked in other recipes. Parsnips, like carrots, can take up to three weeks to germinate and grow best in loamy, loose, well-drained soil. They can either be dug up in the fall for storage or left in the ground until spring. 105 DAYS.