Count 70 to 100 days from the day you sow, then pull a test carrot to check. Carrots go in as seed and stay where they are sown, so there is no transplant date to count from. Clemson Cooperative Extension puts harvest at about 65 to 75 days after planting, so the window is wide and your seed packet breaks the tie. Once the roots are out, cut the tops off and chill them at 33 °F with high humidity. The rest of the season is in Growing Carrots in New Jersey.
The short answer
The soil USDA lists as representative of New Jersey is the Downer series, an Ultisol. That label means old, heavily weathered, leached ground that is naturally acid and low in nutrients. The surface layer of the Downer components USDA NRCS has mapped (133 of them) averages 79 percent sand, 6 percent clay and 15 percent silt. Organic matter sits at about 1.2 percent, and the surface pH is about 6.3, slightly acid. The drainage class is well drained.
Hold those numbers against what a carrot wants. Utah State University Extension says carrots like deep, sandy, well-drained soil rich in organic matter, and that heavy or rocky soil makes the root fork. On texture, Downer passes. With only 6 percent clay there is little to pack around a growing taproot, and well-drained ground does not hold water against it. So a carrot is unlikely to fork in this soil because of clay. The weak spot is the 1.2 percent organic matter. A sandy bed with that little humus dries out fast and feeds thinly, and compost worked in before sowing is the fix.
Heavy ground is another story. Where clay dominates and water lingers, forking is the expected result. Utah State University Extension’s answer is plenty of compost and double digging, which means loosening the layer beneath the topsoil too, so the root has somewhere to go. A raised bed filled with loose, sandy soil does the same job with less back strain. A different variety will not fix it. The source names none, and I won’t invent one.
One caution before you rely on any of this. New Jersey spans hundreds of soil series, and Downer is a starting point, not a diagnosis. The figures above are USDA’s representative values for the surface layer of the series as mapped, not a measurement of a worked garden bed, and the 6.3 is not your pH. River bottoms, hill country and any lot a builder has scraped or filled can look nothing like it. For a closer look at the forking question, see Will Carrots Fork in New Jersey Soil?
The test that settles it in your own garden
Your back yard is the only soil that matters, and a spade and a bucket of water will tell you most of what you need. Do this in the bed where the carrots would go, ideally when the ground is workable but not soaking.
- Dig a hole as deep as a long carrot. Do it with a spade, and set the soil on a tarp in the order it comes out. Layers matter, so keep topsoil on one side and what lies below on the other.
- Look at the depth. Note where the soil changes color or gets hard to dig. A compacted layer, a band of rubble or fill, or a wall of clay partway down will stop a taproot and send it sideways or split it in two.
- Count the stones. Pick through what you dug out. A few pebbles are manageable. If the pile is mostly rock, or you hit a buried brick or chunk of concrete, the bed needs sifting or a raised frame.
- Feel the texture. Squeeze a moist handful. If it falls apart and feels gritty, it is sandy. If it holds together and slides out in a smooth ribbon between thumb and finger, clay is doing most of the talking. Soil that feels silky and a little crumbly sits somewhere in between.
- Watch the water drain. Fill the hole with water and let it empty, then fill it again and watch the second round. If the water vanishes quickly, expect a bed that dries out and needs compost and frequent watering. If it stands there for a long time, you have the slow drainage that breeds forked and rotting roots.
- Send a sample for a lab test. Your eyes and hands cannot read pH or nutrients. Your county extension office can tell you where to send a sample, and the result will give you your own numbers in place of the state’s.
Read the results together. A deep, loose, quick-draining hole needs compost and little else. A shallow or stony one points to a raised bed. A slow-draining, sticky one points to double digging with generous compost, or a raised bed if the layer below will not open up. I am giving no depth, ratio or timing numbers here because the facts behind this page do not carry any, and a made-up figure would only sound authoritative.
What goes wrong here
Most failures in a New Jersey carrot bed trace back to the ground, the summer heat or the water. Here are the ones to watch, with the remedy for each.
- Forked, stubby or twisted roots in heavy or rocky ground. Wherever your test showed clay, stones or a hard layer, the root will split around the obstacle. Add plenty of compost, double dig, or build a raised bed. Fix the ground rather than shopping for a variety, since the extension source names none that sidesteps the problem.
- Thin, slow growth in sandy, low-organic ground. The Downer pattern of well-drained sand with about 1.2 percent organic matter dries fast and holds few nutrients. Work compost into the bed before sowing and keep the seedbed watered. A soil test will show whether acidity or low fertility is part of the problem.
- Poor germination in a hot spell. Carrot seed is small, sown in place, and slow to sprout, and a crust of sun-baked soil can stall it. Keep the surface evenly moist until seedlings show, and if the stand fails, reseed. Carrots cannot be transplanted, so the 70 to 100 days start over from the new seeding date, not the original.
- Splitting from uneven water. A long dry stretch followed by a heavy summer thunderstorm can crack roots as they swell. Water on a steady schedule, and mulch the bed so the soil does not swing between baked and soaked.
- Roots that sprout, soften or wilt in storage. The tops are the catch. The leaves keep drawing moisture out of the root, which is why bunched carrots, with their tops on, keep only about 10 to 14 days, while trimmed ones keep for months. Cut the tops off first. Then hold the roots at 33 °F and high humidity, as Clemson Extension advises. That is just above freezing, not a cellar temperature. Store carrots at 50 °F and they will sprout and go soft in a fraction of the time.
Chewed or tunneled roots are a separate problem with a separate list of causes. If that is what you are seeing, What Eats Carrot in New Jersey, and When sorts out the likely culprits.
Common questions
How many days from seeding until I can pull carrots?
Plan on 70 to 100 days, counted from the day the seed goes in the ground. Clemson Cooperative Extension says to harvest about 65 to 75 days after planting. Pull one test carrot near the early end of your window, and let the rest keep growing if they are still small. This page does not publish a frost date, so check a local source before planning a late harvest.
Will a different variety stop forking?
No. Forking comes from heavy or rocky soil, and Utah State University Extension’s remedy is compost and double digging. A raised bed also works. The source names no variety that changes the outcome, so fix the ground first.
How long do carrots keep after harvest?
It depends on the tops. Bunched carrots keep about 10 to 14 days. With the tops cut off and the roots held at 33 °F and high humidity, they keep for months, because nothing is left drawing moisture out of the root.
Can I store them in a basement or root cellar?
Only if it is cold enough. A space near 50 °F is too warm, and carrots stored there sprout and soften in a fraction of the time they would last at 33 °F. Most New Jersey basements run warmer than that, so a refrigerator is usually the safer bet, as long as the roots are trimmed and kept humid.