Celeriac performs best in cold, wet conditions. This vegetable is therefore an excellent choice for less well-drained soils, especially as celeriac needs a lot of water during cultivation. After harvesting, celeriac can taste a little bitter. Storing the roots for a few days at just above freezing sweetens them slightly. Celeriac can be stored in cool, humid conditions for up to two weeks. NB: It’s not just the root that is packed with flavor; the stems are also great for use in dishes such as soups or pasta sauces. However, like parsnip, celeriac leaves can cause skin irritation, so wear gloves and long sleeves if you are sensitive to them.