Description Heirloom Vegetable. For those that like a celery flavour in vegetable juices, stews, soups or salads celeriac is the plant for you. While this plant will not win any beauty contests, the large white roots are almost fibreless and possess a lovely celery flavour. Fall harvested roots have superior flavour and make the best winter keepers. An added bonus – celeriac is far easier to grow than celery! How to Grow 1750 seed/gram. Seed can be started indoors 6 to 8 weeks early. Sow seed on the surface of the soil-less growing medium. After germination occurs grow on in a bright location or under lights at 18 C (65 F) then harden off and transplant out in late May. In longer growing season areas seed can be started directly outdoors from mid April on. Keep plants evenly watered through the growing season then harvest anytime the roots reach a diameter 5-10 cm (2 – 4″) – fall harvested roots have superior flavour and keep the best.
