Parsnip and Salsify: the forgotten winter vegetables

There is the vegetable that stands in almost every bed, and there is the vegetable you only know from your grandmother. Parsnip and black salsify belong to the second kind. Yet they are exactly what a self-sufficiency bed needs in winter: sturdy roots that do not surrender to frost but get better instead. Anyone who pulls them from the cold ground in February quickly understands why they were a staple food for centuries, before the potato and the carrot pushed them aside.

Why two good roots fell into obscurity

The parsnip (Pastinaca sativa) was a staple vegetable in medieval Central Europe, filling and long-keeping. When the potato arrived, it almost vanished from the gardens and survived only in England and France. The black salsify (Scorzonera hispanica) shares that fate: it was once fondly called winter asparagus, yet it hardly appears in the supermarket today, because peeling the black skin is seen as a chore.

For you in your own garden, that drawback flips into an advantage. Both roots are undemanding to care for, barely troubled by pests, and stand ready to harvest exactly when little else is fresh. What feels impractical in the shops is a gift in the home garden.

The soil decides everything

If a single thing decides between success and frustration with these two crops, it is the soil. Taproots that hit a stone or a compacted layer fork, grow crooked or stay short. The result tastes just as good but is nearly impossible to peel.

Loosen the bed to a spade's depth before sowing, ideally 30 to 40 cm deep, and pick out coarse stones. Lighten heavy clay soils with some sand. Never spread fresh manure, it drives the roots to fork and, with the parsnip, attracts the carrot fly. Ripe compost, worked in shallowly, is plenty. The most elegant approach is to prepare the bed back in the autumn of the previous year.

Sowing: sow early and stay patient

Both roots are sown exclusively straight into the open ground, because raising and transplanting damages the sensitive taproot. The best window is between mid-March and early May · CW 12 to 18, once the soil is workable and a few degrees warm. The parsnip germinates from around 8 °C, the black salsify prefers it a little warmer at about 10 °C.

Patience is key: germination drags on over 2 to 4 weeks, far longer than radishes or lettuce. During that time the seedbed must not dry out, or the sowing comes up patchy. An old gardener's trick is to add fast-germinating radishes as a marker crop in the row. They show you where the row runs and are long harvested before the roots need the space.

1. Prepare the bed

   Loosen the soil to a spade's depth, remove stones and rake the surface fine. Work in ripe compost shallowly, no fresh manure.

2. Choose fresh seed

   Use only seed from the current season. The germination rate of both species drops sharply after just one year, and old seed is the most common reason for failure.

3. Sow in rows

   Draw furrows 30 to 40 cm apart and place the seeds 1.5 to 3 cm deep. The parsnip is a light germinator and wants only a thin covering.

4. Keep it moist

   Keep the seedbed evenly moist until the seedlings emerge. This is the single most important job of those first weeks.

5. Thin out

   Once the seedlings are strong enough, thin them to 10 to 15 cm apart in the row. That gives each root the room to grow thick.

Care through the season

Once the sowing has come up, things get relaxed. Both crops are among the most low-maintenance in the bed and need little attention over the summer.

Why frost makes them sweet

Here lies the real secret of these two roots, and it is the reason you do not have to harvest them hastily in autumn. In the cold, the plant converts part of its stored starch into sugar. That is antifreeze: sugar lowers the freezing point in the tissue, much like grit salt. For you, the result tastes noticeably milder and sweeter after the first nights below zero.

That is why both crops simply stay in the ground. In the lowlands of the German-speaking region the roots shrug off frosts below minus ten degrees, and the black salsify goes even lower. You dig nothing up and store nothing away, you just harvest fresh whenever you need something.

Harvesting all winter long

The harvest season runs from October into March · CW 40 to 13. Lift the roots carefully with a digging fork, because the brittle black salsify in particular snaps easily, and from every break a sticky white milky sap leaks out that turns brown on your fingers. Anyone peeling black salsify is best off wearing gloves and dropping the sticks straight into water with a dash of vinegar.

Whichever of the two you choose, plan to get the last roots out of the bed by the end of March. After that they resprout, turn woody and bolt into flower. If you are after a milder alternative, try the closely related salsify, the oyster plant, which is grown in much the same way.

Parsnip or black salsify, which suits you?

Both share their site and care but differ in character. The parsnip is the more straightforward beginner: a thicker root, easier to peel, sweet and mild in flavour, ideal for soup and the oven. The black salsify is the fine, slightly more demanding delicacy with its asparagus aroma and the sticky milky sap when you clean it.

If you are growing a forgotten winter vegetable for the first time, start with the parsnip. It forgives more and delivers an early sense of success. The black salsify joins in the following year, once the joy of the winter bed has taken hold.

Common questions about parsnip and black salsify

When do you sow parsnip and black salsify?

Both are sown straight into open ground from mid-March to early May · CW 12 to 18, once the soil is workable and a few degrees warm. Raising them in a pot is not worth it, because the sensitive taproot does not tolerate transplanting and then forks.

Why is my sowing not germinating?

The most common reason is old seed. The germination rate of both species drops sharply after just one year, so always use fresh seed from the current season. The second reason is a dried-out seedbed: germination takes 2 to 4 weeks, during which the soil must stay evenly moist.

Do I have to harvest the roots before winter?

No. Parsnip and black salsify stay in the bed all winter and are made even sweeter by frost. You harvest fresh as needed, as long as the ground is not deeply frozen. A cover of straw or leaves keeps the soil workable so you can reach in even in the cold.

Why are my roots forked and crooked?

Forked roots come from stones, compacted soil layers or fresh manure. Loosen the bed to a spade's depth before sowing, pick out stones and fertilise only with ripe compost. On heavy soil a raised bed or a deep box of loose soil helps.

How do I peel black salsify without everything getting sticky?

While peeling, a sticky white milky sap leaks out that turns brown on hands and blade. Work with gloves, peel under running water and drop the peeled sticks straight into water with a dash of vinegar or lemon. That keeps them pale and your hands clean.