When To Plant Collards In Nc

In North Carolina, collard greens thrive when planted for a harvest that sweetens after frost. Getting the timing right is the most important step for a successful crop, and this guide will explain exactly when to plant collards in NC.

Our state’s long growing season and varied climate zones offer two main planting windows. You can grow collards in both spring and fall. The fall planting is often prefered for its sweeter yield.

Collards are a cool-season crop. They grow best in the mild temperatures of spring and fall. Heat makes them bitter and can cause them to bolt, or go to seed.

For the best results, you should plan your planting around the frost dates. Collards can handle a light frost. In fact, cold weather improves their flavor.

Understanding North Carolina’s Planting Zones

North Carolina spans USDA hardiness zones 5b through 8b. This means planting times can vary by several weeks across the state. The state is often divided into three main regions: the mountains, the piedmont, and the coastal plain.

Your local frost dates are your best guide. You can find them through your county’s cooperative extension office.

Average Frost Dates By Nc Region

Mountains (Zone 5b-7a): Last spring frost: Late April to early May. First fall frost: Early to mid-October.
Piedmont (Zone 7a-7b): Last spring frost: Mid to late April. First fall frost: Mid to late October.
Coastal Plain (Zone 7b-8b): Last spring frost: Late March to mid-April. First fall frost: Late October to early November.

Spring Planting Schedule For Collards

Spring planting aims to get collards established before the summer heat arrives. You want to plant them as early as the soil can be worked.

For a spring crop, the general rule is to plant seeds or transplants 2 to 4 weeks before your last expected spring frost date. This gives them time to grow while conditions are cool.

Recommended Spring Planting Dates

Mountains: Plant seeds indoors in early March. Transplant or direct seed outdoors from early to mid-April.
Piedmont: Plant seeds indoors in late February. Transplant or direct seed outdoors from mid-March to early April.
Coastal Plain: Plant seeds indoors in early February. Transplant or direct seed outdoors from late February through March.

Fall Planting Schedule For Collards

Fall is the premier season for growing collards in North Carolina. The plants mature in cool weather and often taste sweeter after exposure to frost.

For a fall harvest, you need to work backwards from your first fall frost date. The goal is to have plants well-established before the days get too short and cold.

Recommended Fall Planting Dates

Mountains: Direct seed or transplant in early to mid-August.
Piedmont: Direct seed or transplant from mid-August to early September.
Coastal Plain: Direct seed or transplant from late August through mid-September.

For a continuous harvest into winter, you can succession plant every two to three weeks during the fall planting window. Some gardeners even plant in late fall for a very early spring harvest, as the seeds will lie dormant and sprout as soon as conditions are right.

How To Plant Collard Greens In North Carolina

Once you know when to plant, the next step is understanding how. Proper site selection, soil preparation, and planting technique set the stage for healthy growth.

Choosing The Right Location And Soil

Collards need full sun, which means at least 6 to 8 hours of direct sunlight per day. They can tolerate partial shade, especially in the hotter parts of the state, but growth may be slower.

The soil should be fertile, well-draining, and rich in organic matter. Collards prefer a soil pH between 6.0 and 6.5. You can test your soil with a kit from a garden center or through your local extension service.

Preparing Your Garden Bed

Clear the area of weeds and debris.
Loosen the soil to a depth of at least 12 inches using a garden fork or tiller.
Mix in 2 to 4 inches of well-rotted compost or aged manure. This improves drainage and fertility.
If your soil test indicates a need, add lime to raise the pH or sulfur to lower it, following package instructions.
Rake the bed smooth before planting.

Direct Seeding Vs. Using Transplants

You can start collards from seeds sown directly in the garden or from transplants you start indoors or purchase. Each method has its advantages.

Direct seeding is simpler and disturbs the roots less. Transplants give you a head start, which is especially useful for the fall crop to ensure maturity before hard frost.

Steps For Direct Seeding

Create a shallow furrow about 1/2 inch deep.
Sow seeds thinly, spacing them about 1 inch apart.
Cover lightly with soil and pat down gently.
Water the area carefully to avoid washing away the seeds.
Once seedlings are a few inches tall, thin them to stand 12 to 18 inches apart. You can eat the thinned seedlings as microgreens.

Steps For Using Transplants

Start seeds indoors 4 to 6 weeks before your planned outdoor planting date.
Sow seeds in cell trays filled with a sterile seed-starting mix.
Keep the soil moist and provide plenty of light.
Harden off seedlings for a week before transplanting by gradually exposing them to outdoor conditions.
Plant transplants at the same depth they were growing in their pots, spacing them 12 to 18 inches apart in the garden.
Water them in well after planting to settle the soil around the roots.

Caring For Your Collard Plants

Consistent care through the season is key to a bountiful harvest of tender leaves. Focus on watering, feeding, and pest management.

Watering And Mulching Requirements

Collards need consistent moisture for best growth. Aim for about 1 to 1.5 inches of water per week, either from rainfall or irrigation.

Water deeply at the base of the plants to encourage strong root growth. Avoid overhead watering if possible, as wet leaves can promote fungal diseases. Early morning is the best time to water.

Applying a 2- to 3-inch layer of organic mulch is highly beneficial. Use straw, shredded leaves, or pine straw. Mulch helps retain soil moisture, suppresses weeds, and keeps soil temperatures more even.

Fertilizing For Optimal Growth

Collards are moderate feeders. They benefit from a balanced fertilizer at planting and a nitrogen boost during the growing season to support leaf production.

At planting, mix a balanced, slow-release organic fertilizer into the soil according to the package label.
Side-dress the plants with a nitrogen-rich fertilizer, like blood meal or a balanced vegetable food, about 4 to 6 weeks after transplanting or when direct-seeded plants are half-grown.
For a long fall crop, a second side-dressing in mid-October can be helpful.

Common Pests And Diseases In Nc

Several pests enjoy collards as much as we do. Regular inspection is your best defense.

Primary Pests To Watch For

Cabbage Worms and Loopers: Green caterpillars that chew holes in leaves. Handpick them or use an organic Bt (Bacillus thuringiensis) spray.
Aphids: Small, soft-bodied insects that cluster on undersides of leaves. A strong spray of water or insecticidal soap can control them.
Flea Beetles: Tiny black beetles that make small shot holes in leaves. Use floating row covers to protect young plants.
Harlequin Bugs: Shield-shaped stink bugs that suck plant juices. Remove by hand and keep the garden free of plant debris.

Common Diseases

Black Rot: A bacterial disease causing V-shaped yellow lesions. Use disease-free seeds and practice crop rotation.
Downy Mildew: Causes yellow spots on top of leaves with fuzzy gray growth underneath. Improve air circulation and avoid overhead watering.
Cabbage Yellow: A fungal disease that stunts growth. Maintain proper soil pH and rotate crops.

Crop rotation is crucial. Do not plant collards or other cabbage family plants (like kale, broccoli, or Brussels sprouts) in the same spot more than once every three to four years.

Harvesting And Storing Your Collards

One of the joys of growing collards is the long harvest period. You can begin harvesting leaves long before the plant is fully mature.

When And How To Harvest

You can start harvesting individual leaves when the plant is about 10 to 12 inches tall. Always harvest from the bottom of the plant upward.

Choose mature, dark green, outer leaves that are at least 8 inches long.
Use a sharp knife or scissors to cut the leaf stem about 1 to 2 inches from the main stalk.
Leave the central growing bud and smaller inner leaves intact so the plant can continue producing.
Regular harvesting encourages new, tender growth.

For a “cut-and-come-again” approach, you can cut the entire plant about 4 inches above the ground. It will often send out a new flush of leaves for a second, smaller harvest.

Best Practices For Storage

Freshly harvested collards are best used right away, but they store well for a short time.

Do not wash the leaves until you are ready to use them.
Place unwashed leaves in a perforated plastic bag in the crisper drawer of your refrigerator. They should keep for about 5 to 7 days.
For long-term storage, collards freeze beautifully. Blanch leaves for 3 minutes, plunge into ice water, drain, and pack into freezer bags.

Enjoying Your Fall Harvest Through Winter

In many parts of North Carolina, collards will survive in the garden through the winter, especially with some protection. A heavy frost or even a light freeze makes the leaves taste sweeter by converting starches to sugars.

You can use a floating row cover or cold frame to extend the harvest season. In the coastal plain and piedmont, you may be able to harvest fresh collards all winter long from a fall planting.

Recommended Collard Varieties For Nc Gardens

Choosing a variety suited to our climate can improve your success. Here are some excellent choices for North Carolina gardeners.

Traditional And Heirloom Types

Georgia Southern (Creole): A classic, heat-tolerant variety with large, blue-green, slightly savoyed leaves. Excellent for both spring and fall.
Vates: A dwarf, compact plant that is very cold-tolerant. It’s a good choice for small gardens or late fall plantings.
Morris Heading: Forms a loose head like cabbage. Known for its tenderness and sweet flavor, especially after frost.

Hybrid And Improved Varieties

Champion: A vigorous grower with smooth, dark green leaves. It has good resistance to bolting and holds well in the garden.
Flash: A fast-maturing hybrid with tender, slightly savoyed leaves. Good for earlier harvests in either season.
Top Bunch: A hybrid developed for its uniform, upright growth, making it suitable for closer spacing and mechanical harvesting. It’s also very productive.

Frequently Asked Questions

What Is The Latest You Can Plant Collards In North Carolina?

For a traditional fall harvest, aim to have transplants in the ground by late September in the piedmont and coastal plain, and by early September in the mountains. However, you can plant collard seeds as late as early October in warmer areas for a overwintering crop that will produce a very early spring harvest.

Can You Plant Collards In The Summer In Nc?

It is not recommended to plant collards in the peak summer heat (June through early August). High temperatures cause bitter flavor, tough leaves, and premature bolting. The best strategy is to plant in early spring for a harvest before it gets too hot, or wait for the ideal late summer/early fall planting window.

How Do You Protect Collards From Frost?

Collards are quite frost-hardy and can withstand temperatures down to the low 20s Fahrenheit, especially if they are acclimated. A light frost improves flavor. For extended hard freezes, you can protect them with a floating row cover, old bedsheets, or a cold frame. This can extend your harvest by several weeks or even months.

Should I Start Collard Seeds Indoors For A Fall Crop?

Starting seeds indoors in mid to late summer for a fall transplant is an excellent strategy. It gives the plants a head start during the hottest part of the year, ensuring they are strong and established for the prime fall growing season. Just be sure to harden off the seedlings properly before planting them out in the garden.

Why Are My Collard Plants Flowering?

When collards produce a flower stalk, it’s called bolting. This is triggered by prolonged exposure to cold temperatures (in young plants) or, more commonly in NC, by rising temperatures in late spring. Once a plant bolts, the leaves become bitter. The best approach is to harvest the plant at that point and replant for the fall season. Choosing bolt-resistant varieties for spring planting can help.