Red tomatoes

Best Planting Times for Tomatoes in New Jersey

Planting MethodActivityRecommended Dates
Outdoor PlantingIndoor Seed StartingMarch 15 – April 15
Transplant OutdoorsMay 1 – May 31
Greenhouse PlantingYear-roundAdjust planting based on temperature control in the greenhouse

Planting Conditions in New Jersey

New Jersey has a humid subtropical climate, with hot, humid summers and mild winters, placing the state within USDA Hardiness Zones 6a to 7b. These conditions allow for a relatively long growing season ideal for tomato cultivation.

Sun Requirements

Tomatoes need full sun, with at least 6-8 hours of direct sunlight daily. New Jersey’s summer climate typically provides ample sunlight, essential for robust tomato growth.

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Useful Tools for Starting Tomatoes Indoors

Using the right tools can save you time and increase your success rate.

Seeds

Quality seeds lead to better germination and healthier plants. Starting with high-quality seeds gives your tomatoes the best chance to thrive from the very beginning.
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Browse Tomato Seeds on Amazon

Planting Trays

Planting trays help you organize your seedlings and ensure they have enough space to grow before you transplant them outdoors. This makes the process more efficient and increases the chances of strong, healthy plants.
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Grow Lights

Grow lights are essential if you don’t have enough natural sunlight. They provide your seedlings with the light they need to grow strong and healthy, even in less-than-ideal conditions.
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Check out Grow Lights on Amazon

Seed Starting Soil

Using light, fine soil specifically designed for seed starting helps young roots establish quickly and promotes healthy growth. It’s an easy way to give your seedlings the best start possible.
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Greenhouse Growing

In New Jersey, where the growing season can be shortened by cooler temperatures, a greenhouse is essential for extending the growing period. It allows you to start your tomato plants earlier in the spring and continue growing them well into the fall. With adequate heating, you can protect your plants from frost and grow tomatoes almost year-round.

Currently, the 8x10x7.5 FT Greenhouse is priced at $999. It’s a great investment for ensuring your tomatoes thrive all year round.
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Check the latest price on Amazon.

Fertilizer

Fertilizer is essential to provide your tomato plants with the nutrients they need for strong growth and a successful harvest.
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Other planting guides for New Jersey:

Any questions on growing tomatoes? Visit our forum to discuss: Growing Tomatoes

Starting Tomatoes Indoors

In areas like Trenton (Zone 7a), start tomato seeds indoors from March 15 to April 15. This timing ensures that seedlings are ready for transplanting outdoors in early May, after the last frost has passed.

Transplanting Tomato Seedlings

Transplant seedlings outdoors from May 1 to May 31, once soil temperatures are consistently above 60°F. Space the seedlings 24-36 inches apart in rows at least 36 inches apart to ensure proper air circulation and sunlight exposure.

General Care and Maintenance

Watering:

  • Water deeply and consistently to maintain evenly moist soil. New Jersey’s humid climate can cause fluctuations in soil moisture, so regular watering is important.
  • Water at the base of the plants to prevent wetting the foliage, which helps reduce the risk of fungal diseases.

Fertilizing:

  • Apply a balanced fertilizer at planting and again when the first fruits begin to form. Adding compost to the soil before planting can enhance soil fertility and structure.

Pest and Disease Management:

  • Monitor for common pests like aphids, cutworms, and tomato hornworms. The humid climate can also encourage fungal diseases, so vigilance is necessary.
  • Use organic or integrated pest management strategies to protect your plants from pests and diseases.

Harvesting Tomatoes:

  • Harvest tomatoes when they are fully colored and firm. Frequent harvesting during New Jersey’s peak summer months helps to prevent overripening and ensures the best quality fruit.
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