110-120 Days to maturity. Apium graveolens. Giant Prague Celeriac Seeds. Non-GMO, Biennial, open-pollinated, heirloom. AKA ‘Large Smooth Prague’ Celeriac. Hardier and more disease resistant than traditional celery. Giant Prague Celeriac is a root vegetable known for its flavor similar to celery, thrives in mild climates. It is a great storage vegetable commonly used in soups, vegetable stock, dried as a seasoning, or blended with other vegetables. ~60,500 seeds/oz.