When to plant · 20 cities · zones 7a–7b

When to plant tomatoes in New Jersey

Start Roma Tomato seeds indoors around Mar 4 and transplant around Apr 22 — the New Jersey statewide median, counted from a last spring frost of Apr 15 across 604 ZIP codes and 58 NOAA stations.

Mar 4Start indoors6 weeks before last frost
Apr 22Plant outApr 9 – May 2 across the state
Apr 15Last spring frostmedian · 1 in 10 years after May 1
Jul 6First harvest75 days from transplant

The rule: Six weeks indoors at 75–85 °F soil, then transplant a week after the last frost and cage at transplant.

New Jersey tomatoes, by cultivar

Statewide median last frost Apr 15, first fall frost Oct 28, 2027 season. Each cultivar's own indoor lead time and days to maturity, same engine as the Plan Builder.

CultivarStart indoorsPlant outFirst harvestDays
Roma TomatoRoma VF (determinate paste)Mar 4Apr 22Jul 675 from transplant
San Marzano TomatoSan Marzano (indeterminate paste)Mar 4Apr 22Jul 1180 from transplant

Tight means first harvest lands within two weeks of the median first fall frost. Statewide dates are the ZIP-weighted median of every NOAA 1991–2020 station New Jersey's ZIP codes resolve to.

Tomatoes in New Jersey, city by city

Roma Tomato, scheduled from each city's nearest NOAA station — the same dates as its frost page.

CityLast frostStart indoorsPlant outFirst harvest
Newarkzone 7bApr 4Feb 21Apr 11Jun 25
Jersey Cityzone 7bApr 4Feb 21Apr 11Jun 25
Patersonzone 7aApr 15Mar 4Apr 22Jul 6
Elizabethzone 7bApr 2Feb 19Apr 9Jun 23
Trentonzone 7aApr 17Mar 6Apr 24Jul 8
Cliftonzone 7aApr 15Mar 4Apr 22Jul 6
Bayonnezone 7bApr 2Feb 19Apr 9Jun 23
East Orangezone 7aApr 4Feb 21Apr 11Jun 25
Camdenzone 7bMar 30Feb 16Apr 6Jun 20
Passaiczone 7bApr 3Feb 20Apr 10Jun 24
Union Cityzone 7bMar 30Feb 16Apr 6Jun 20
Vinelandzone 7aApr 24Mar 13May 1Jul 15
Hobokenzone 7bMar 30Feb 16Apr 6Jun 20
New Brunswickzone 7aApr 15Mar 4Apr 22Jul 6
Perth Amboyzone 7bApr 15Mar 4Apr 22Jul 6
Plainfieldzone 7aApr 11Feb 28Apr 18Jul 2
West New Yorkzone 7bMar 30Feb 16Apr 6Jun 20
Sayrevillezone 7aApr 15Mar 4Apr 22Jul 6
Hackensackzone 7bApr 3Feb 20Apr 10Jun 24
Lindenzone 7bApr 11Feb 28Apr 18Jul 2

What New Jersey tomatoes need

SeedsThe cultivar decides the sauce. Everything downstream is damage control.
  • Roma Tomato Seed (300+)

    The determinate paste tomato: it ripens most of its crop inside a three-week window. That is a liability for eating and an enormous advantage for sauce day.

  • San Marzano Tomato SeedMust have

    The paste tomato Italian canners actually use. Low seed cavity, low water, high pectin: it reduces to a sauce in half the time a slicer takes and never tastes thin.

StartSoil temperature and light intensity, indoors, weeks before your frost date.
  • Organic Seed Starter Potting MixMust have

    Seed-starting mix is not potting soil with a nicer label — it is finer, lighter, and low in nutrients on purpose, because a seedling's first roots want air and moisture, not fertiliser.

  • Seedling Heat Mat + Digital ThermostatMust have

    Peppers germinate on soil temperature, not air temperature. At 65 °F a habanero takes a month and half of them rot; at 85 °F it is up in eight days. The thermostat is the half that matters.

  • T8 Full-Spectrum Grow Lights, 1 ft 4-packMust have

    A south window in March delivers a fraction of the light a pepper seedling needs, and the plant tells you by stretching. Two inches of LED above the canopy for 16 hours a day fixes it permanently.

  • 72-Cell Trays with 1020 Bottoms, 5-PackMust have

    The cheap black nursery trays crack after one season and flex enough to break roots when you lift them. These do not. Over five seasons the price per use is lower than the throwaways.

GrowRoot volume, nutrition and structure. Where most home crops actually fail.
  • 5-Gallon Fabric Grow Bags, 5-Pack

    Fabric pots air-prune roots and drain faster than a plastic pot can, which is the entire reason container tomatoes fail. Five gallons is the honest minimum for a pepper; a tomato wants ten.

  • Ocean Forest Potting SoilMust have

    Pre-charged with enough nutrition to carry a transplant for its first month without feeding, which is exactly the window when most container plants stall.

  • Organic Tomato-Tone 3-4-6 with 8% CalciumMust have

    The NPK ratio is the point: low nitrogen, higher potassium. Feed a tomato a high-nitrogen lawn fertiliser and you get a magnificent six-foot plant with four tomatoes on it.

  • Rot-Stop Blossom End Rot Concentrate

    Blossom end rot is almost never a soil calcium shortage — it is a calcium *transport* failure caused by inconsistent water. A foliar calcium spray buys time while you fix the watering, which is the real cure.

  • 58" Square Tomato Cages, 3-PackMust have

    The conical wire tomato ring from the hardware store is 33 inches tall and an indeterminate San Marzano will laugh at it in July. Height and square geometry are what actually hold a loaded plant.

  • Drip Irrigation System with Timer, 16 Nozzles

    Blossom end rot, split tomatoes and bitter fruit all trace back to the same thing: water that swings. A $50 timer removes the human from the loop and removes the swing.

ProtectFrost, hornworms, aphids, and the fungal pressure that follows a wet July.
  • Captain Jack Copper Fungicide, 16 oz

    Early blight and septoria arrive with a wet July and work up the plant from the bottom. Copper is preventative — sprayed after you see it, you are already losing.

  • Thuricide BT Concentrate, 16 oz

    Bacillus thuringiensis kills caterpillars and nothing else. For tomato hornworms — which can strip a plant in 48 hours — it is the most targeted tool that exists.

CookReduction, texture, and the non-reactive pans that keep tomato tasting like tomato.
  • Stainless Steel Food Mill, 3 discsMust have

    A blender pulverises tomato skins and seeds into the sauce, which is where bitterness comes from. A mill separates them out — no blanching, no peeling, no ice bath. It removes an entire hour from sauce day.

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Tomatoes in New Jersey: questions

When should I plant tomatoes in New Jersey?

Transplant around Apr 22 at the statewide median; across the state that date runs from Apr 9 in the warmest tenth of New Jersey's ZIP codes to May 2 in the coldest. To cut the freeze risk to one year in ten, count from May 1 instead of the median last frost. Use the city table for your own town.

When do I start tomatoes seeds indoors in New Jersey?

Around Mar 4 for Roma Tomato: 6 weeks before the statewide median last frost, on soil held at 75–85 °F.

When is the last frost in New Jersey?

The ZIP-weighted median of NOAA 1991–2020 station medians is Apr 15. In the warmest tenth of New Jersey's ZIP codes the median last frost falls on or before Apr 2; in the coldest tenth, on or after Apr 25.

When will New Jersey tomatoes be ready to harvest?

Roma Tomato planted on the statewide date is ready around Jul 6: 75 days from transplant.

More for New Jersey

Tomatoes in every state → · New Jersey frost dates → · How frost-date math works →