How Long Do Parsnips Take To Grow At Home

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Parsnips require similar care to their sister carrots, including deep, sandy loam oil. Their quality improves when harvested after a hard, killing frost. This same process of starch-to-sugar conversion caused by frost can be achieved if roots are refrigerated for a month before consumption.

How long do parsnips take to grow at home? The answer to that question is not straightforward, as parsnips can be overwintered for harvest as soon as soil thaws in spring.

For a clinically correct answer, parsnips should be seeded in May or June and harvested in late fall after exposure to several light freezes. From seed to harvest normally takes about 120 days.

One of the most common causes of delay may be seed germination which may be delayed if the soil is too cold or if there is not enough moisture and light. The ideal soil temperature is 77°F (25°C)

Grow Parsnips At Home
Grow Parsnips At Home

Parsnip Seed Sowing

Before planting, the soil should be prepared by removing rocks and breaking up any large lumps to a depth of at least 12 inches (30 cm)

As always, cover the bed with about four to five inches of compost to introduce microorganisms essential to plant health and resilience. Fresh manure should be avoided, opting for cured compost less than six months old.

Seeds should be sown half an inch deep (13 mm), spaced at 2 to 3 seeds per inch (25mm).

When seedlings are an inch tall (2.5 cm), thin them with scissors to a final spacing of two to four inches between plants (5 – 10 cm). Sow along with fast germinating radishes to break soil crust and mark row.

The soil temperatures required for parsnip seed germination are between 50 and 85°F (10 to 30°C) – the lower the temperature, the longer it takes for the seeds to germinate, and the converse applies equally.

The optimum germination soil temperature is, like carrots, 77°F (25°C), and germination time is between 14 and 21 days. Keep the soil damp to speed germination.

Crop Rotation

Remember that you need a bed that hasn’t seen a plant from the Apiaceae family for at least three years. The Apiaceae family includes carrots, celery, fennel, parsnips, and several herbs.

Avoiding sequential plantings from the same plant family interrupts pathogen and pest development cycles. To increase your growing success rates, your planned parsnip bed should not have had carrots or celery growing in it for three years.

I have illustrated the concept in the table below and advise you to do the same, journalling your choices.

YearBed 1Bed 2Bed 3Bed 4
Year 1Family AFamily BFamily CFamily D
Year 2Family BFamily CFamily DFamily A
Year 3Family CFamily DFamily AFamily B
Year 4Family DFamily AFamily BFamily C

Growing Parsnip

Hardy annual parsnips are grown for their long, tapering roots, which resemble white carrots. Parsnip flavor doesn’t fully develop until the roots have been exposed to temperatures below freezing for two to four weeks in the late fall and early winter.

The optimal soil for growing parsnips is loose, sandy, well-draining, devoid of large pebbles, and between 5.8 and 7.5 on the pH scale. For best growth, parsnips need full sun but can tolerate very slight shade.

They are less tolerant of heat than carrots; their ideal growing temperature is between 60 and 65°F (~16 to 18°C). Additionally, plants need a lot of organic matter and moisture. Raised beds are a great place to produce parsnips, but containers can also be used.

Parsnip Care and Maintenance

Parsnips benefit from regular watering an inch deep per week (25 mm). The volume and the regularity are important—mulching around the plant aids in moisture retention and weed control.

A heavy mulch covering can help shield plants from the elements during the winter.

Roots may become bitter, hard, fibrous, malformed, and small if they don’t get enough water. On heavier soils, water deeply once weekly; on sandier soils, twice weekly.

Sandier soil can be wetted to a depth of ten inches with an inch of water, so double the input to ensure the root gets enough water. An inch of water will wet six inches of clay soil, and water retention is better.

To determine how deeply the soil is wet, use a trowel. Keep the water running even if it is only a few inches.

Weeds encroaching on the plants should be cut off to avoid damaging the root surroundings. Parsnip is not a hungry plant and does not need fertilizing.

If you do fertilize, wait at least 35 days from the planting date before doing so.

Possible Challenges to Growing Parsnip

Several factors can impact parsnip roots and leaves; the environment, plant diseases, insects, and wildlife can all affect how a plant looks and how healthy it is. It’s crucial to make the right diagnosis to address the issue.


  • Cutworms can cut young plants off at the base.
  • Root larvae feed on and destroy the roots of many crops.
  • Leafhoppers spread Aster yellows. Symptoms are hairy, bitter roots and yellow tops.

Other Disorders

  • Rocky, heavy, or compacted soil may lead to forked or split roots. Split roots can also result from drought.
  • When plants produce strong, green tops but little root development, it’s typically because they have been planted too closely together.
  • In addition, excessive nitrogen fertilization can promote rapid leaf growth at the expense of root development.
  • The parsnip leaves can cause skin irritation, possibly causing a rash in some people, especially on bright, sunny days. Wear long pants, sleeves, and gloves when pulling weeds or harvesting parsnips.

Harvesting Parsnip

Parsnips should not be picked until the first fall light frosts, when the tips of the plants have frozen, for optimal results.

Frost encourages the roots’ starch to be converted to sugars, giving them a sweeter flavor.

Harvesting crops before the earth freezes or cover the plants to keep them from freezing. Harvesting a parsnip involves carefully excavating the plant’s area to reveal the root’s top.

The root is then carefully but forcefully pulled from the soil by grabbing the top of the parsnip just above the base.

Before chilling in airtight bags, the tops of the parsnips should be removed and the roots cleaned. You can also keep parsnips fresh until use by storing them in wet sand.

How Long Do Parsnips Take To Grow At Home?

The answer to that question is not straightforward.

Parsnips can be overwintered for harvest as soon as soil thaws in spring.

For a clinically correct answer, parsnips should be seeded in May or June and harvested in late fall after exposure to several light freezes. From seed to harvest normally takes about 120 days.

Gardeners can also leave some of the crops in the ground over winter.  After several hard freezes, cover the parsnips with several inches of straw. 

Harvest the remaining crop in early spring before growth resumes. 

Frequently Asked Questions

How long do parsnips take to grow?

Typically parsnips take around 120 days to grow. Parsnips will vary in growing times depending on the variety and the weather conditions where you live.

Are Parsnips Easy To Grow?

Parsnips are easy to grow but must be sown directly in their final location as they do not transplant well. Good rich soil is required, Sow early spring, and they will be ready to harvest in around 120 days.

How long does it take parsnips to sprout?

Parsnips will take 21 days to sprout. This can be sped up by placing a wood plank over the sown row until the seed germinates. This will prevent evaporation and keep the seed moist for quicker germination.

What month do you plant parsnips?

Parsnips are best planted in April but can be sown until the end of June. April is perfect as the soil temperature has warmed sufficiently to allow quick germination before the seed rots.

What fertilizer do parsnips need?

Parsnips are a root and need more Phosphorus and Potassium than Nitrogen. Look for a balanced food with a ratio of around 3-20-20 NPK. Adding compost to the planting area before planting will also help feed parsnips.

In Closing

We have answered the “How long is a piece of string” question. How long do parsnips take to grow at home? About 120 days – give or take, depending on the mentioned factors.

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