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Hardiness Zones in NJ

Q: I'm confused about the planting zones in NJ. After doing some Googling on the subject and finding various colored maps, I still don't get it. I live in Hunterdon County and I've heard that our state has many sub-zones. Which one are we? Does this mean I should avoid planting certain vegetables at certain times? Please help.

A: Thanks for writing! We recently added a gardening calendar to give readers a friendly reminder of when to plant which vegetables in NJ. You'll find it right here.

Most of NJ is in Hardiness Zone 6, with the exception of the northwest corner of the state which is Zone 5 (cooler). Also, a few spots on the shore and in Gloucester, Salem and Cumberland Counties are Zone 7 (warmer). features a map of the NJ hardiness zones and sub-zones in the event you need more specific information.

Your Hardiness Zone basically determines the final date of the spring thaw for your area. It also indicates that certain plants will thrive better there (at certain times of the year) than others. However, I wouldn't worry much about this if you're planting a vegetable garden in NJ. May 15th is the official "garden planting" day in our state, when you can safely assume that no more frost will occur until the autumn. On this day, put all of your hot-weather loving plants such as tomatoes, cucumbers, peppers, squash, etc. into the ground.

Can you start your NJ garden earlier than May 15th? Absolutely. Many cool-weather plants aren't affected by the frost, and in fact won't thrive once the scorching summer sun kicks in. You can put these in sometimes as early as March 15th (that's 2 months before the expected last frost date in NJ). It really depends on the type of vegetable and the kind of temps that plant prefers.

Cool weather loving plants: peas, radishes, spinach, beets, kale, cabbage, carrots

Early summer plants: lettuce, mesclun greens, swiss chard, broccoli, arugula

Hot weather loving plants: tomatoes, peppers, eggplant, cucumbers, zucchini

Read our article about First Vegetables to Plant in Early Spring in NJ for more details. is owned by Mike Hyde and 4 Seasons Lawn Care. We build, deliver and install raised garden beds to Hunterdon and Warren Counties in NJ and Northampton County, PA.

Contact us for more information: 908 783 5733 or email today!

Want more tips? Our 95-page Gardening E-Guide for NJ Zone 6 is FINALLY here!

Looking for an easy-reference guide covering when and how to plant veggies, herbs and companion flowers in NJ? From Asparagus to Zucchini, it's all here in the Complete Beginner's E-Guide to Organic Gardening in NJ Zone 6!

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Too much of an expert for the Beginner E-Guide? Then maybe our Encyclopedia of VEGGIES, HERBS and COMPANION FLOWERS will prove to be a handy, desktop reference for you.


(If you already purchased the Complete Beginner's E-Guide below, then you do not need to buy this ebook!)

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When is it safe to plant nursery plants in my NJ garden?

5 Common Gardening Mistakes

What Vegetables to Plant on May 15

Ode to the Turnip

Best Seed Catalogs

What does Kale Look Like? (Kale vs. Collards vs. Swiss Chard)

NJ Zone 6 Organic Gardening Guide Teaches New Gardeners How to Grow Their Own Dinner

Ordering our NJ Gardening Guide: was it good for you?

IT'S FINALLY HERE! NJ Zone 6 Complete Planting Guide Now Available for Purchase



When and How to Start Prepping Your Garden Beds in New Jersey

When to Plant Early Spring Vegetables in NJ

Garden Planning in February? Yes! Get Ready for Spring Planting in NJ

Getting Your Raised Garden Beds Ready for Spring Planting

Is Rototilling Necessary? To Till or Not to Till Your NJ Garden Beds

Garden Planting Dates for NJ Zone 6

How to Plant Peas When There is Snow on the Ground

What to Do When You Miss Your Planting Date

Baking the Weed Seeds Out of Your Garden Beds

Planting Onions in Early Spring in NJ Zone 6

Broccoli Planting Instructions for NJ Zone 6

Sacrificial Carrot: How to Make Your NJ Carrot Crop Go the Distance

How to Grow Strawberries Organically

How to Plant Cucumbers in NJ Zone 6

Growing Herbs Successfully in NJ Zone 6

Spring Gardening in NJ: What to Plant on May 15?

Mid Spring Gardening Upkeep



Organic Composting Q&A

Mulch Q&A for Vegetable Gardens

Choosing a Fertilizer for Your Vegetable Garden

6 Quick Tips for Gardening Without the Use of Chemical Fertilizers or Pesticides



How Long Do Garden Seeds Last? Seed Viability Chart

How to Grow Vegetables from Seed

Growing Lettuce from Seed vs. Direct Sowing Lettuce



The Advantages of a Raised Bed Garden

NJ Zone 6 Gardening Q&A

Best Time to Water Your Vegetable Garden, Best Time to Pick Vegetables

Gardening Tips for Beginners

Growing Vegetables in Shade: Is It Possible?

NJ Zone 6 Complete Garden Planting Guide

Where Does Your Garden Grow?

Hardiness Zones in NJ

Gardening Tricks for Busy and Lazy People

Gardening With Young Children

Hay or Straw: Which is Right for Your Vegetable Garden?

What is a bumper crop?



What Vegetables Can You Plant in Mid Summer?

July Gardening Update: Zone 6 NJ

How often should I water my vegetable garden?

When to Pick Garden Vegetables?

What to Do With an Overgrown Vegetable Garden

Tomatoes Planting Instructions for NJ Zone 6

Peppers Planting Instructions for NJ Zone 6

What can you do with your NJ garden in July?

Picking and Cooking Beets: How to Harvest and Prepare Beets so People Actually Enjoy Them



Growing Tomatoes in New Jersey

Training Your Tomato Plants

Jersey Tomato Harvesting Q&A

Jersey Tomato Plants: Common Problems

Tomatoes Planting Instructions for NJ Zone 6



Organic Pest Control in Your Garden: Slugs, Snails, Potato Beetles

Companion Planting



Why Dig Organic Garden Beds During the Fall?

Broccoli Planting Instructions for NJ Zone 6

Cool Weather Crop: How to Grow Cabbage in NJ Zone 6

When to Plant Fall Vegetables in NJ Zone 6

Average Frost Date for NJ Zone 6, and How to Prep Your Garden for the Big Chill

Fall Vegetable Planting Guide for NJ Zone 6

Putting Your NJ Garden to Bed for Winter


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