Let’s be brutally honest: celeriac is not going to win any beauty contests in the vegetable patch. With its gnarled, warty exterior and tangled roots, it looks more like a prop from a fantasy movie than a culinary delicacy. Add to that its pungent, earthy, celery-like flavor—which admittedly is an acquired taste—and it’s easy to see why it isn't universally beloved.
However, if you happen to be a devoted fan of this rustic root, the clock is officially ticking. For those who dream of silky celeriac purées and hearty winter remoulades, now is the crucial moment to get your hands dirty and start sowing.
Celeriac is notorious for demanding a remarkably long growing season. Unlike rapid-fire radishes or fast-growing leafy greens, this knobbly beast needs several months to swell to a respectable, harvestable size. Waiting until late spring or early summer to plant your seeds is a guaranteed recipe for tiny, disappointing roots.
To get a necessary head start, you will need to sow your seeds indoors or in a heated greenhouse. Celeriac seeds are incredibly fine and, crucially, require light to germinate. Fill your seed trays with a good quality compost, water the soil thoroughly first, and then sprinkle the seeds sparingly across the surface. Resist the urge to bury them; simply press them gently into the damp soil to ensure good contact.
Patience is your best tool during this phase. Germination can be notoriously sluggish, often taking up to three weeks. During this time, it is vital to keep the environment warm and consistently moist. Covering the trays with a clear plastic dome or a sheet of glass can help trap the necessary humidity, creating the perfect microclimate for the tiny seeds to wake up.
Once the seedlings have developed their true leaves, are large enough to handle, and the danger of the last spring frost has firmly passed, they can be hardened off and transplanted into their permanent outdoor homes.
Remember that celeriac evolved from marshland plants—meaning it has an insatiable thirst. If you allow the soil to dry out during the warm summer months, your hard-earned harvest will end up woody, split, and hollow. Keep the watering can handy, keep the beds weed-free, and your early start will be rewarded with a spectacular autumn harvest.