Salsify

1. 1

   Prepare deep, stone-free, light soil

   The single most important salsify rule. Like parsnip, salsify produces a long (30 cm) pale tap root that forks around any stone or obstruction, ruining the harvest. Dig the bed deeply (30+ cm) before sowing; remove all stones; break up clay clods. Don't add fresh manure in the season of sowing — fresh organic matter also causes forking. Sandy, stone-free loam is the perfect salsify soil; on clay, raise a bed of imported sandy soil or grow in deep containers.

2. 2

   Sow direct, late March to early May

   Don't transplant — salsify resents disturbance of the developing taproot. Sow direct in shallow drills 1 cm deep, 30 cm between rows. Use fresh seed from this year's packet — salsify seed loses viability quickly after one year. Germination takes 14–21 days in cool soil. Salsify-only variety: Sandwich Island (mauve-flowered, white-skinned roots) is the UK standard.

3. 3

   Thin to 15 cm apart

   Once seedlings are 5 cm tall (3–4 leaves), thin to one plant every 15 cm. Crowded plants produce smaller, thinner, forked roots. Use the thinnings in salads (very young salsify leaves are mild and edible). Keep the row weed-free — competition reduces root size.

4. 4

   Water in summer dry spells

   Salsify produces longer, fatter roots with consistent moisture. Weekly deep watering in dry weather through July and August. Mulch with compost along the row to conserve moisture. Drought stress causes splitting and woody texture in the roots.

5. 5

   Wait for autumn — and a first frost — before lifting

   Don't lift salsify too early. Roots reach full size by September but flavour improves dramatically after the first hard frost (typically late October–November in the UK), which converts starch to sugar in the root. Begin lifting from late October onwards as needed. Lift carefully with a fork — pushed deep alongside the row to lift the long taproots without snapping.

6. 6

   Leave roots in the ground over winter

   Salsify is one of the few winter-storage crops that prefers in-ground storage to a shed. Roots stand in the ground through the worst UK winters (RHS H6–H7) and remain fresh, sweet, and crisp. Lift as needed from October through to March. In hard frost: a mulch of straw or bracken over the row makes lifting easier (frozen ground around the crowns). In cold areas (Highlands, exposed sites), lift before Christmas and store in damp sand in a cool shed.

7. 7

   Cook simply to taste the unusual flavour

   Salsify's oyster flavour is subtle and easily masked. The classic approach: scrub roots, scrape skin (wear gloves — the milky sap stains skin), drop into water with lemon juice (prevents browning), boil 15–20 minutes until tender. Serve with butter and parsley, or in a white sauce. Roasted salsify is wonderful: peeled chunks tossed in oil and roasted alongside potatoes. Salsify soup with leek and cream is the traditional French dish.

8. 8

   Let one or two roots flower and seed for next year

   Save seed. Salsify is biennial — first-year roots are the crop; second-year flowers and seed. Let one or two leftover plants overwinter and flower in May–June of their second year. Beautiful large mauve flowers open at sunrise and close by midday (the Jack-go-to-bed-at-noon common name). Seed heads look like giant dandelion clocks; harvest seed before they shatter. Use fresh next spring — salsify seed loses viability after one year.

Very few pest problems; a robust and underrated root vegetable.