When to plant or sow Parsnip 'Halflange White Gem'?

Parsnip 'Halflange White Gem' is sown directly outdoors from March through May, once the soil temperature reaches at least 7°C. Choose a site in full sun or partial shade with deep, well-drained soil—loam or sandy soil is ideal. Parsnips develop long taproots, so thorough soil preparation is essential. Dig over the bed to at least 30 cm depth, removing all stones, clods, and debris that might cause the roots to fork or split. Incorporate well-rotted compost or garden compost into the top layer, but avoid fresh manure, which encourages fanging and hairy roots. Sow seeds thinly in drills 1.5–2 cm deep, spacing rows 30 cm apart. Parsnip seed has notoriously poor germination and a short viability, so use fresh seed each year and sow generously. Germination is slow, often taking three weeks or more, especially in cool spring weather. Some gardeners sow a few fast-germinating radish seeds in the same drill to mark the row and break any surface crust. Once seedlings have two true leaves, thin them progressively to a final spacing of 10–15 cm apart within the row. This gives roots room to swell without competition. Water gently after thinning to settle soil around the remaining plants. Keep the bed weed-free in the early weeks, as young parsnip seedlings grow slowly and are easily smothered. Water during prolonged dry spells to prevent the soil from cracking, which can split developing roots. A light mulch of garden compost between rows helps retain moisture and suppress weeds once plants are established.