Why doesn't my parsley seed germinate?

Parsley seed is famously slow — 4–6 weeks isn't unusual, especially in cold soil below 10°C. Soak seed overnight before sowing; pour boiling water down the drill at sowing time (the heat softens the seed coat and triggers germination); keep the bed warm and moist. Don't give up on a batch before 6 weeks — patience is the answer.

Flat-leaf or curly parsley — which is better?

Flat-leaf (also called Italian) has the better flavour, a more open habit that's easier to pick, and is preferred by most cooks. Curly has a stronger texture, holds up to longer cooking, and is hardier in cold weather. Grow flat-leaf for everyday picking; curly for winter cropping. Both have the same growing requirements.

Is parsley an annual or biennial?

Biennial — it grows leaves in year one, runs to seed in year two, then dies. Treat as an annual: sow fresh each spring. The flower stalks in year two have a stronger flavour but the leaves become coarse and bitter. Save seed from second-year plants if you want to grow next year's batch from your own stock.

Can I grow parsley in containers in the UK?

Yes — a 25 cm pot grows enough parsley for daily picking. Use peat-free multi-purpose compost. Water consistently; parsley wilts in dry compost and gets bitter under stress. Place in sun or part-shade. One pot per household is usually plenty; for heavy use, two pots in succession.

When can I pick parsley?

8–10 weeks after sowing for the first picks, then continuously. Pick outer stems at the base of the plant; the centre produces new growth indefinitely. Don't strip a plant — leave 6–8 stems each time. Winter-protected plants give pickings from December onwards in southern England.

My parsley has gone yellow and bolted — can I save it?

No. Bolted parsley (sending up a flower stem) is going to seed and won't produce more useful leaves. The flowering shoots themselves are coarse and bitter. Pull the plant, compost the foliage, and re-sow if there's still growing time. Bolting in spring usually means the plant is in its second year; in summer, drought stress.

Persil

Petroselinum crispum

Sow parsley seed direct from mid-March to August in successional batches every six weeks; or start indoors in modules from February. Germination is famously slow — 4–6 weeks isn't unusual. Pouring boiling water down the drill before sowing speeds things up; so does soaking the seed overnight first. Parsley is hardy (RHS H4) and crops right through a UK winter from a sheltered bed. It runs to seed in its second year, so sow fresh each spring and treat as an annual. Flat-leaf (Italian) parsley has the better flavour and a more open habit; curly is harder-leaved and better at standing through winter cold. Worth having two or three patches in any kitchen garden.

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