Why won't my parsnip seed germinate?

Parsnip seed is famously unreliable — slow (3–5 weeks), patchy, and dependent on fresh seed. Old seed (more than a year past the harvest date) germinates very poorly. Buy fresh seed each year. Sow into warm, moist soil; cover lightly; keep watered. Don't give up before 6 weeks — late seedlings still emerge.

Why are my parsnips forking?

Stones in the soil, fresh manure dug in before sowing, or compacted ground. Each obstacle the growing root meets causes a fork. Dig the bed deeply before sowing; remove stones; don't add manure (use compost from the previous autumn instead). For heavy clay, sow short varieties (Avonresister, Lancer) or grow in deep tilth raised beds.

When do parsnips taste best?

After the first hard frost. Frost triggers the plant to convert stored starches to sugars as an antifreeze response, sweetening the roots dramatically. Pre-frost parsnips are coarser and less sweet. The traditional UK harvest is from late October onwards; the best of the crop is lifted in December and January.

How do I store parsnips through winter?

The bed they grow in is the best storage. Parsnips keep firm and improve in flavour in the ground from October until March. Lift as needed. If your soil freezes hard or floods, cover the row with a thick straw mulch before the worst weather — you can fork through frost-bound soil to reach them. Lifted roots store in damp sand for 2–3 months.

What variety of parsnip is best?

Tender and True is the heritage UK standard — long, slim, good flavour. Gladiator is a modern canker-resistant F1, more uniform. White Gem is reliable and heavy-cropping. For heavy clay, choose short varieties: Avonresister (canker-resistant short) or Lancer.

Are parsnip leaves safe to handle?

Mostly yes, but parsnip foliage contains furanocoumarins that can cause phytophotodermatitis (skin reaction with sunlight) in sensitive people on hot days. Wear long sleeves and gloves when thinning, weeding or topping the foliage in summer. Wash hands after handling. The roots themselves are entirely safe.

Pastinaak

Pastinaca sativa

Sow parsnip seed direct from March to May in deep, stone-free, well-prepared soil; germination is slow (3–5 weeks) and unreliable, so sow fresh seed each year and mark the row with quick-germinating radishes. Parsnips are very hardy (RHS H7) and improve in flavour after frost — the cold converts starches to sugars and turns a coarse autumn root into a sweet winter one. Lift from October through to March, taking them as needed; the crop stores far better in the ground than out of it. Choose Tender and True (heritage), Gladiator (canker-resistant F1), or White Gem (heavy cropper). Don't add manure before sowing — it makes the roots fork. The classic UK winter roast vegetable.

View full growing guide →