New Jersey’s September offers a sweet spot for vegetables that grow quickly in the state’s fertile soil and moderate temperatures. If you’re looking for the best vegetables to plant in september in new jersey, you have come to the right place. The early fall season here is perfect for crops that thrive in cooler weather and shorter days.
Many gardeners think spring is the only time to plant. But September in New Jersey gives you a second chance to grow fresh produce before the first frost. The soil is still warm from summer, which helps seeds germinate fast. Plus, cooler air temperatures reduce stress on plants.
In this guide, you will learn exactly what to plant now. We will cover leafy greens, root vegetables, and even some hardy brassicas. Each recommendation is chosen for New Jersey’s specific climate zones, from the coastal areas to the northern highlands.
Let’s get started with the top picks for your September garden.
Best Vegetables To Plant In September In New Jersey
This section covers the top vegetables that perform well when planted in September across New Jersey. These crops are selected for their fast growth and tolerance to cooler temperatures.
Leafy Greens For Quick Harvests
Leafy greens are your best bet for September planting. They grow fast and you can harvest them in as little as 30 days.
- Lettuce: Choose loose-leaf varieties like Black Seeded Simpson or Red Sails. They mature in 45-50 days. Plant seeds 1/4 inch deep in well-drained soil.
- Spinach: Bloomsdale Long Standing is a classic. Spinach actually tastes sweeter after a light frost. Sow seeds 1/2 inch deep.
- Arugula: This peppery green grows very fast. You can harvest baby leaves in just 20-25 days. Perfect for salads.
- Kale: Lacinato or Winterbor kale are cold hardy. They survive into November. Plant seedlings 12 inches apart.
- Swiss Chard: Bright Lights variety adds color. It tolerates light frosts well. Harvest outer leaves first.
These greens need consistent moisture to germinate. Water them lightly every day until sprouts appear. Then water deeply twice a week.
Root Vegetables That Store Well
Root crops are ideal for September because they develop underground where soil stays warm longer. They also store well for winter use.
- Carrots: Nantes or Danvers varieties work great. Sow seeds 1/4 inch deep in loose, sandy soil. Thin seedlings to 2 inches apart.
- Beets: Detroit Dark Red is reliable. Soak seeds overnight before planting to speed germination. Harvest both roots and greens.
- Radishes: Cherry Belle or French Breakfast mature in just 25 days. Plant them every two weeks for continuous harvest.
- Turnips: Purple Top White Globe is a standard. They grow well in cooler weather. Harvest when roots are 2-3 inches wide.
- Parsnips: These take longer but taste sweeter after frost. Hollow Crown is a good choice. They need loose soil free of stones.
Root vegetables need full sun and consistent watering. Keep the soil moist but not waterlogged. Mulch around them to retain moisture and suppress weeds.
Brassicas For Fall And Winter
Brassicas, or cole crops, are cold-hardy and perfect for September planting. They can handle light frosts and even improve in flavor after cold weather.
- Broccoli: Waltham 29 or Green Goliath are good picks. Plant transplants 18 inches apart. Harvest the main head before flowers open.
- Cauliflower: Snow Crown matures in 50-60 days. It needs consistent moisture and cool temperatures. Blanch the head by tying leaves over it.
- Cabbage: Early Jersey Wakefield is a classic. It forms small, pointed heads. Plant 12 inches apart in rows.
- Brussels Sprouts: Long Island Improved is reliable. These take 90-100 days but survive frosts well. Harvest sprouts from bottom up.
- Collards: Georgia Southern is heat and cold tolerant. They are very easy to grow. Harvest outer leaves as needed.
Brassicas benefit from rich soil with added compost. They need regular watering, about 1 inch per week. Watch for cabbage worms and use row covers if needed.
Legumes For Soil Health
Peas and beans can still be planted in early September in southern New Jersey. They fix nitrogen in the soil, which helps future crops.
- Snow Peas: Oregon Sugar Pod II is a good choice. They mature in 60 days. Plant seeds 1 inch deep and provide trellis support.
- Snap Peas: Sugar Ann is an early variety. It produces sweet pods in 55 days. Pick them when pods are plump.
- Fava Beans: These are very cold tolerant. They can be planted until mid-September. Harvest when pods are full but still green.
Legumes need well-drained soil and full sun. Inoculate seeds with rhizobium bacteria for better nitrogen fixation. Water regularly but avoid wetting foliage.
Planting Tips For New Jersey’s September Climate
New Jersey spans USDA hardiness zones 6a to 7b. Northern areas get frost earlier than coastal regions. Knowing your zone helps you plan planting dates.
Understanding Your First Frost Date
The average first frost date in New Jersey varies. In northern counties like Sussex, it can be as early as September 30. In southern counties like Cape May, it may be November 15.
Check your local extension service for exact dates. Then count backward from that date using the days to maturity on seed packets. Add 14 days for fall planting because growth slows in cooler weather.
For example, if your first frost is October 15 and you want to plant kale that matures in 50 days, plant by August 25. But if you are planting radishes that mature in 25 days, you can plant until September 20.
Soil Preparation For Fall Crops
September soil is usually still warm but may be dry. Prepare your beds by removing spent summer plants. Add 2-3 inches of compost and work it into the top 6 inches.
Test your soil pH. Most fall vegetables prefer a pH between 6.0 and 7.0. Add lime if needed to raise pH, or sulfur to lower it. Do this at least two weeks before planting.
Rake the soil smooth and remove any large clods or rocks. This is especially important for root vegetables like carrots and parsnips.
Watering Strategies For September
September can be dry in New Jersey. Newly planted seeds need consistent moisture to germinate. Water lightly every day until seedlings emerge.
After plants are established, water deeply once or twice a week. Aim for about 1 inch of water per week, including rainfall. Use a soaker hose or drip irrigation to avoid wetting leaves.
Mulch around plants with straw or shredded leaves. This keeps soil cool and moist. It also suppresses weeds that compete for water.
Using Row Covers And Cold Frames
Row covers are lightweight fabric that protects plants from frost and pests. They can extend your growing season by 2-4 weeks. Use them on nights when frost is forecast.
Cold frames are simple boxes with glass or plastic tops. They trap heat from the sun and keep plants warm at night. You can build one from old windows or buy a kit.
For extra protection, use cloches made from plastic bottles. Cut the bottom off and place them over individual plants. Remove them during the day to prevent overheating.
Regional Considerations For New Jersey Gardeners
New Jersey has three main growing regions. Each has slightly different conditions that affect September planting.
Northern New Jersey (Zones 6A-6b)
Northern areas have shorter growing seasons. First frost can come as early as late September. Focus on fast-maturing crops like lettuce, radishes, and spinach.
Plant transplants instead of seeds for slower crops like broccoli and cabbage. This gives them a head start. Use row covers from mid-October onward.
Consider planting garlic in late September. It overwinters and harvests in June. Hardneck varieties like Music or German Extra Hardy work well here.
Central New Jersey (Zones 6B-7a)
Central Jersey has a longer fall season. First frost typically occurs in mid-October. You can plant a wider range of crops, including carrots and beets.
Succession planting works well here. Plant a new row of lettuce or radishes every two weeks. This gives you continuous harvests until frost.
Try planting peas in early September. They prefer cooler weather and will produce before hard frost. Provide trellis support for climbing varieties.
Southern New Jersey (Zones 7A-7b)
Southern areas have the longest growing season. First frost may not come until November. You can plant many crops through September and even into October.
Plant broccoli, cauliflower, and cabbage transplants now. They will mature before winter. Also try planting fava beans for a late fall harvest.
Consider planting cover crops like winter rye or hairy vetch in late September. They protect soil over winter and add nutrients when tilled under in spring.
Common Mistakes To Avoid When Planting In September
Many gardeners make simple errors that reduce their fall harvest. Here are the most common ones and how to avoid them.
- Planting too late: Always check your first frost date. Count backward using days to maturity plus 14 days for slower fall growth.
- Ignoring soil temperature: Some seeds like spinach and peas germinate best in cooler soil. Use a soil thermometer to check before planting.
- Overwatering: September can be rainy. Check soil moisture before watering. Stick your finger 2 inches into the soil; if it feels wet, wait.
- Not thinning seedlings: Crowded plants compete for nutrients and water. Thin seedlings to the spacing recommended on seed packets.
- Forgetting to fertilize: Fall crops still need nutrients. Apply a balanced fertilizer like 10-10-10 at planting time and again after 4 weeks.
- Neglecting pest control: Aphids, cabbage worms, and slugs are still active in September. Check plants weekly and remove pests by hand or use insecticidal soap.
Avoid these mistakes and your fall garden will thrive. Keep a garden journal to note what works and what doesn’t for next year.
Harvesting And Storing Your Fall Vegetables
Knowing when and how to harvest extends the life of your vegetables. Some crops can stay in the ground after frost if protected.
Harvesting Tips For Each Crop
Leafy greens like lettuce and spinach should be harvested when leaves are large enough to eat. Pick outer leaves first, leaving the center to grow. This gives you multiple harvests.
Root vegetables like carrots and beets are ready when roots are about 1 inch in diameter. Pull them gently from loose soil. Store them in a cool, dark place.
Brassicas like broccoli and cauliflower should be harvested before flowers open. Cut the main head with a sharp knife. Side shoots may develop for a second harvest.
Peas and beans are ready when pods are full but still tender. Pick them every few days to encourage more production. Leave some to dry for seeds if desired.
Storing Vegetables For Winter Use
Many fall vegetables store well for months. Carrots, beets, and parsnips can be stored in a root cellar or refrigerator. Remove tops before storing to prevent moisture loss.
Kale and collards can be blanched and frozen. Wash leaves, blanch in boiling water for 2 minutes, then plunge into ice water. Drain and freeze in bags.
Winter squash like butternut or acorn can be stored in a cool, dry place. Cure them at 80-85°F for 10 days first. Then store at 50-55°F.
Garlic and onions need to be cured before storage. Hang them in a dry, airy place for 2-3 weeks. Then trim roots and store in mesh bags.
Frequently Asked Questions
What vegetables can I plant in September in New Jersey?
You can plant leafy greens like lettuce, spinach, and kale. Root vegetables like carrots, beets, and radishes also work well. Brassicas such as broccoli and cabbage are good choices too.
Is it too late to plant tomatoes in September in New Jersey?
Yes, it is generally too late for tomatoes. They need warm weather and 60-80 days to mature. Focus on cool-season crops instead.
Can I plant garlic in September in New Jersey?
Yes, late September is ideal for planting garlic. It overwinters and harvests in June. Choose hardneck varieties for northern areas.
How do I protect my September-planted vegetables from frost?
Use row covers, cold frames, or cloches. Water the soil before a frost to release heat. Harvest tender crops before hard frost.
What are the best vegetables to plant in September in New Jersey for beginners?
Radishes, lettuce, and spinach are easiest for beginners. They germinate quickly and require little care. Kale and Swiss chard are also forgiving.
Final Thoughts On September Planting In New Jersey
September is a productive month for New Jersey gardeners. The soil is warm, the air is cool, and pests are less active. With the right choices, you can enjoy fresh vegetables well into November.
Start with fast-growing greens and root vegetables. Add some hardy brassicas for winter harvests. Use row covers to extend your season further.
Remember to check your local frost dates and prepare your soil well. Water consistently and watch for pests. With a little effort, your fall garden will be a success.
Now is the time to get out there and plant. Your September garden will reward you with fresh, flavorful vegetables that taste better than anything from the store.