Gardening in New Jersey: What to Plant & When (Month-by-Month Guide)
Gardening in New Jersey can be incredibly rewarding — but timing matters more here than in many other parts of the country. Between unpredictable spring weather, coastal influences, and wide temperature swings from north to south, knowing what to plant and when makes all the difference.
This month-by-month guide is designed specifically for New Jersey gardeners, whether you’re planting vegetables, herbs, flowers, or maintaining an established garden. Use it as a reference throughout the year.
Understanding New Jersey’s Growing Zones
Most of New Jersey falls within USDA Hardiness Zones 6a–7b, but local conditions can vary significantly:
- North Jersey tends to have later frosts and cooler springs
- Central Jersey sits right in the middle for timing
- South Jersey & coastal areas usually warm earlier but can have sandy soil and strong winds
Always adjust planting dates slightly based on your local conditions and recent weather patterns.
January – Planning & Preparation
January is quiet in the garden, but it’s the perfect time to prepare.
What to do:
- Plan your garden layout
- Order seeds and supplies
- Review last year’s successes and failures
- Start organizing tools and raised beds
What to plant:
- Nothing outdoors
- Optional: start onions or slow-growing herbs indoors late in the month
February – Start Seeds Indoors
February is when the growing season quietly begins indoors.
What to plant indoors:
- Onions
- Leeks
- Celery
- Herbs like thyme and parsley
Tips:
- Use grow lights rather than windows
- Keep seedlings warm and well-ventilated
- Label everything (you’ll forget otherwise)
March – Cold-Hardy Crops
As soil begins to thaw, some crops can tolerate cool temperatures.
What to plant outdoors:
- Peas
- Spinach
- Lettuce
- Radishes
- Kale
What to plant indoors:
- Tomatoes
- Peppers
- Eggplant
- Broccoli
- Cabbage
Late frosts are still common — be ready to cover young plants.
April – Spring Planting Ramps Up
April is a major transition month.
What to plant outdoors:
- Potatoes
- Carrots
- Beets
- Swiss chard
- Onions
- Broccoli & cabbage transplants
Watch out for:
- Sudden cold snaps
- Heavy spring rains that compact soil
May – Warm-Season Crops Go In
By mid-May, most of New Jersey is past the danger of frost.
What to plant outdoors:
- Tomatoes
- Peppers
- Cucumbers
- Zucchini
- Beans
- Corn
- Basil
Important note:
Young plants are especially vulnerable to wildlife this time of year. Some gardeners use fencing, repellents, or professional deer repellent services to protect new growth.
June – Maintenance & Succession Planting
June is about growth, watering, and planning ahead.
What to plant:
- Bush beans (second round)
- Summer squash
- Herbs
- Heat-tolerant greens
Tasks:
- Mulch to retain moisture
- Stake tomatoes early
- Monitor for pests and disease
July – Harvest & Heat Management
July brings heat and harvests.
What to plant:
- Fall carrots
- Beets
- Bush beans
- Basil (last chance)
Tips:
- Water deeply in the morning
- Watch for bolting in leafy greens
- Shade young plants during heat waves
August – Fall Garden Begins
Late summer is when smart gardeners plan for fall.
What to plant:
- Broccoli
- Kale
- Spinach
- Lettuce
- Turnips
Prepare for:
- Shorter daylight
- Cooler nights
- Renewed deer activity as natural food sources decline
September – Cool-Season Crops Thrive
September is ideal for leafy greens.
What to plant:
- Spinach
- Arugula
- Lettuce
- Radishes
Tasks:
- Remove spent summer plants
- Add compost
- Prepare beds for fall planting
October – Cleanup & Protection
October is about finishing strong and protecting what remains.
What to do:
- Harvest remaining crops
- Plant garlic for next year
- Mulch beds
- Protect perennials
Cool-season crops often improve in flavor after light frosts.
November & December – Close the Season
As temperatures drop, outdoor growing winds down.
What to do:
- Clean tools
- Drain hoses
- Cover beds with leaves or straw
- Review notes for next season
This is also a great time to plan improvements for next year’s garden.
Final Thoughts
New Jersey gardening is all about timing, flexibility, and preparation. By following a month-by-month approach and adjusting for your local conditions, you can dramatically improve your success year after year.
Bookmark this guide and refer back to it often — your garden will thank you.