When to plant Parsnip in Temperate Australia

Temperate zone — applies to Sydney, Melbourne, Adelaide, Perth, Newcastle and similar areas. Growing elsewhere? Cool · Subtropical · Tropical · Arid.

Parsnips can be sown direct from July right through to March in temperate Australia — a generous window that skips only the depths of autumn. Sow shallowly at 5 mm, thin to 5–10 cm apart in rows 35–50 cm apart, and then be patient twice over: germination is famously slow at 20–30 days, and roots need 120–140 days to reach full size. The one non-negotiable is fresh seed. Parsnip seed loses viability within about a year, and last season's packet is behind most "nothing came up" disappointments.

Sowing calendar — temperate zone

Green months are your sowing window: July to March.

Growing notes

Fully hardy, parsnips are made for the temperate calendar: frost from May onwards does no harm at all and actually sweetens the roots, so a spring or summer sowing that matures into winter gives the best-flavoured crop of the year. July and August sowings sit slowly in cold soil and stretch the long side of that 120–140 days; sowings from September onwards germinate more willingly, while a February or March sowing matures through winter for spring digging.

The crop is won or lost in the first month. Seed sown 5 mm deep must stay continuously moist for the full 20–30 day germination — one dry weekend can end it. Cover the row with a board or damp hessian until shoots appear, or sow a few radishes along the row as markers so you know where to water. And always use this year's seed.

Soil should be deep, loose and stone-free, dug well beforehand but never freshly manured — fresh manure and rocky ground both cause forked, twisted roots. Once established, parsnips need little beyond steady water and thinning to their final 5–10 cm spacing. Leave roots in the ground over winter and dig as needed; the soil stores them better than any fridge.

Parsnip at a glance

Common questions

Why won't my parsnip seeds germinate?

Usually old seed or a seedbed that dried out. Parsnip seed is only reliable for about a year, and it needs constant moisture for the full 20–30 days it takes to germinate.

When should I sow parsnips in temperate Australia?

Any time from July through to March. Sowings that mature into winter frosts produce the sweetest roots.

Why are my parsnips forked and twisted?

Fresh manure, stones or compacted lumps in the soil make the taproot split and divert. Sow into deep, loose, stone-free ground that was manured for a previous crop, not this one.

Do parsnips taste better after frost?

Yes — cold converts starches in the root to sugars. Roots left in the ground through a few frosts are noticeably sweeter than early-dug ones.

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