Parsnips have a long taproot that can grow up to a foot in length and roughly three inches in diameter at the crown. Growing above ground, the plant’s foliage resembles large celery leaves and stems. The tapered root varies in skin color depending on variety, from a yellow-beige to a brighter white. A Parsnip’s flesh is always a creamy white. Parsnips have smooth skin with a sweet, nutty flavor and fine grained flesh.