- You Will Get 500 Seeds Of Celeriac Giant Prague Garden Vegetable Seeds. - This is for 500 Celeriac seeds this is the giant Prague Celeriac this takes about 110 days to harvest. - This is a root and has the taste between a Parsley and a celery this is harvested for soups for flavoring foods. - These should be planted close to the surface where the bulb grows halfway out of the ground similar to a onion.