65-80 days. The Yellow carrot appears to be a classic carrot in its shape but not in its color. Roots are a beautiful golden shade, and they grow to be up to six inches long with tapered ends. They have a very tender texture with a sweet taste. This garden crop can be grown in zones three to nine and in full sun. It requires sandy and rich soil with no rocks or obstacles so that the roots can grow directly down. The Yellow carrot is ready to harvest between sixty five and eighty days.