Growing Parsnip: A Complete Profile
By Growing Home Greens Team · July 29, 2026
Parsnip looks like a pale carrot and grows much the same way, but it takes considerably longer in the ground and rewards leaving it there past the season’s first frost.
Sowing and the long wait
Direct-sow only. Parsnip’s long taproot dislikes disturbance, so transplants don’t work. Sow about 2 weeks before your last frost, a quarter to half inch deep. It’s a slow crop, taking about 110 days to maturity, and a light frost after that point improves the flavor by converting some of the root’s starches to sugar. Many gardeners deliberately leave parsnips in the ground until after the first hard frost rather than harvesting right at the 110-day mark, which is where a canker-resistant type like Javelin earns its keep: more time in the ground is more time for the disease to find a soft spot.
Forked roots and dead seed
Forked or stunted roots usually trace back to rocky, compacted, or recently-amended-with-fresh-manure soil. Parsnip wants deep, loose, stone-free soil to grow a long straight root, the same requirement carrots have. Parsnip seed also loses viability fast; use fresh seed each year rather than trusting a leftover packet from a prior season, since old parsnip seed germinates poorly.
A long, undisturbed occupant of one square
Parsnip isn’t linked to specific companions or antagonists in our data. See the full companion guide for parsnip for how it’s tracked. Given its long season and taproot, place it in the Garden Designer somewhere it can sit undisturbed from spring sowing through a fall or even early-winter harvest.
Sources: Javelin F1 Parsnip Seed, Johnny’s Selected Seeds.
Companion planting guide for Parsnip · Find your planting dates
Typically viable in USDA zones 2-9. Not sure your zone? Look it up by ZIP code.
Method: Direct sow: Direct-sow outside. Parsnip doesn't transplant well, or doesn't need the extra time indoors.
See exact start-indoors, direct-sow, and harvest dates for your zone →
How many Parsnip plants fit per square foot?
Spacing: 4 per square foot (square-foot-gardening spacing). Mature height: 1-1.5 ft.
Varieties worth considering
- Javelin F1 (Pastinaca sativa): Parsnip canker, a fungal disease that rots the shoulder of the root while it's still in the ground, is the crop's main letdown after all that patience. Johnny's Selected Seeds notes Javelin has strong field resistance to canker and holds its size in the ground longer than older open-pollinated types, which matters here since the whole strategy is leaving roots in past frost rather than pulling them on schedule. (source)
- Warrior F1: Johnny's describes large cylindrical roots with a slow taper that size up quickly, at about 105 days, but explicitly not recommended for overwintering since it can grow oversized. Choose this over Javelin if you want an early-to-mid-fall harvest rather than leaving roots in past frost. (source)
- Panorama F1 (Organic): A longer-season type at 120 days with long, slim, tapered roots, per Johnny's, and wide geographic adaptability the company specifically calls out for the Midwest and Northeast. The organic-certified option of the three, if that matters for your seed sourcing. (source)
Cited from the source shown next to each variety. We haven't grown these ourselves yet, so treat this as a research-backed starting point, not a personal endorsement.
Where to buy parsnip seeds
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See it growing
Search YouTube for "growing parsnip" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
Pin this for later
Growing Parsnip: A long-season root crop that gets better after a frost. Patience through a long summer pays off in a sweeter fall harvest.
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