Kentucky gardeners should plant collards six weeks before the first autumn frost. This timing ensures a sweet, tender harvest before winter sets in. The best time to plant collard greens in Kentucky depends on your specific region, but the general rule holds true for most of the state.
Collards thrive in cool weather. They actually taste better after a light frost. So, knowing your local frost dates is key to a successful crop.
Best Time To Plant Collard Greens In Kentucky
For a fall harvest, aim to plant collards in late summer. In most of Kentucky, that means mid-July to mid-August. This gives the plants enough time to mature before the first hard freeze.
Spring planting is also possible. For a spring crop, plant collards 3-4 weeks before the last expected frost. In Kentucky, that’s usually late March to early April. Spring collards grow quickly but may bolt if temperatures spike.
Understanding Kentucky’s Climate Zones
Kentucky spans USDA hardiness zones 6a to 7a. Northern Kentucky (near Cincinnati) is cooler than the western part of the state (near Paducah). This affects planting dates.
- Zone 6a: First frost around October 10-20. Plant fall collards by August 1.
- Zone 6b: First frost around October 20-30. Plant fall collards by August 10.
- Zone 7a: First frost around October 30-November 10. Plant fall collards by August 20.
These are general guidelines. Check your local extension office for precise dates. The University of Kentucky Cooperative Extension Service has county-specific info.
Why Fall Planting Is Prefered
Fall-planted collards are sweeter. Cold temperatures convert starches to sugars. This makes the leaves less bitter. Spring collards can be tough and bitter if they mature in hot weather.
Fall collards also face fewer pest problems. Aphids and cabbage worms are less active in cooler weather. You’ll spend less time managing insects.
Spring Planting Considerations
If you want collards in early summer, spring planting works. But you must act fast. Plant as soon as the soil can be worked in spring. Collards can handle light frosts.
Use row covers if a hard freeze is predicted. Spring collards grow best when temperatures stay between 60°F and 70°F. Once it gets above 80°F, they may bolt (go to seed).
Step-By-Step Guide For Planting Collards In Kentucky
Choose The Right Variety
Some collard varieties do better in Kentucky’s climate. Here are top picks:
- Georgia Southern: Heat tolerant, good for spring and fall
- Vates: Cold hardy, excellent for fall planting
- Champion: Slow to bolt, reliable for both seasons
- Flash: Fast maturing (55 days), great for late plantings
Heirloom varieties like Morris Heading also work well. They have been grown in the South for generations.
Prepare The Soil
Collards need rich, well-drained soil. Test your soil pH first. Aim for a pH between 6.0 and 6.8. Kentucky soils are often acidic, so you may need lime.
Add 2-3 inches of compost before planting. Work it into the top 6-8 inches of soil. Collards are heavy feeders. They need plenty of nitrogen for leafy growth.
Direct Seeding Vs. Transplants
You can start collards from seed or buy transplants. Direct seeding is cheaper. Transplants give you a head start.
For direct seeding:
- Sow seeds 1/4 to 1/2 inch deep
- Space seeds 3 inches apart in rows
- Thin seedlings to 12-18 inches apart once they have 4 leaves
- Water well after planting
For transplants:
- Set transplants 12-18 inches apart
- Plant them slightly deeper than they were in the pot
- Water immediately to settle the soil
- Use a starter fertilizer for a quick boost
Watering And Mulching
Collards need consistent moisture. Give them 1-1.5 inches of water per week. More during dry spells. Water at the base to prevent leaf diseases.
Mulch with straw or shredded leaves. This keeps soil cool and moist. It also suppresses weeds. In Kentucky’s hot summers, mulch is essential for spring crops.
Caring For Your Collard Plants
Fertilizing Schedule
Collards need nitrogen every 3-4 weeks. Use a balanced fertilizer like 10-10-10. Apply 1/2 cup per 10 feet of row. Side-dress when plants are 6 inches tall, then again when they reach 12 inches.
For organic options, use fish emulsion or blood meal. Compost tea also works well. Avoid over-fertilizing, which can make leaves tough.
Pest And Disease Management
Common pests in Kentucky include:
- Cabbage worms: Handpick or use Bt (Bacillus thuringiensis)
- Aphids: Spray with neem oil or insecticidal soap
- Flea beetles: Use row covers early in the season
- Slugs: Set out beer traps or use diatomaceous earth
Diseases like black rot and clubroot can occur. Rotate crops yearly. Don’t plant collards where other brassicas grew the previous year. Good air circulation helps prevent fungal issues.
Thinning And Spacing
Proper spacing is critical. Crowded plants produce smaller leaves. Thin seedlings to 12-18 inches apart. Rows should be 24-36 inches apart.
You can eat the thinnings. They are tender and delicious in salads or stir-fries. Don’t waste them.
Harvesting Collards In Kentucky
When To Harvest
Fall collards are ready 60-80 days after planting. Start harvesting when the outer leaves are 8-10 inches long. Pick from the bottom up. Leave the inner rosette to keep growing.
Spring collards mature faster. Harvest before temperatures consistently exceed 80°F. The leaves will be most tender in early to mid-May.
How To Harvest
Use a sharp knife or scissors. Cut the outer leaves at the base. Leave at least 4-6 inner leaves for continued growth. You can harvest multiple times from the same plant.
For a whole plant harvest, cut the stem 2 inches above the ground. New shoots may form from the stump. This gives you a second crop.
Storing Fresh Collards
Collards store well in the refrigerator. Wash and dry the leaves. Wrap them in a damp paper towel. Place in a plastic bag. They will keep for 5-7 days.
For longer storage, blanch and freeze collards. They retain flavor for up to 6 months. You can also can or dehydrate them.
Extending The Growing Season
Using Row Covers
Row covers protect collards from frost. They can extend your harvest into December. Use lightweight fabric that lets light through. Secure the edges with soil or rocks.
In Kentucky, a hard freeze (below 28°F) can damage collards. Row covers add 4-6 degrees of protection. For extra warmth, use a heavier frost blanket.
Cold Frames And Hoop Houses
Cold frames are simple structures. They trap heat from the sun. Place your collard bed inside a cold frame for winter harvests. You can build one from old windows or PVC pipes.
Hoop houses are larger. They can cover entire rows. In Kentucky, hoop houses allow collard harvests through January. The leaves may not grow much in deep winter, but they stay edible.
Overwintering Collards
Some collard varieties can survive Kentucky winters. Mulch heavily with straw or hay. Cover with row covers during extreme cold. The plants will go dormant but resume growth in early spring.
Overwintered collards are extra sweet. They have survived multiple frosts. Harvest them in March before they bolt.
Common Mistakes Kentucky Gardeners Make
Planting Too Late
If you plant fall collards after mid-August, they may not mature. Kentucky’s first frost can come as early as October 10 in some areas. Count backward 60-80 days from your first frost date.
Late-planted collards produce small leaves. They may not have time to develop full flavor. Stick to the six-week rule for best results.
Ignoring Soil Preparation
Collards need rich soil. Many Kentucky gardens have heavy clay. This drains poorly. Amend with compost and organic matter. Raised beds work well for collards.
Poor soil leads to stunted growth. Leaves may be yellow and tough. Invest time in soil prep for a better harvest.
Overcrowding
Planting collards too close together is common. They need space for air circulation. Overcrowding promotes disease. It also reduces leaf size.
Follow spacing guidelines. Thin seedlings ruthlessly. Your remaining plants will thank you.
Companion Planting With Collards
Good Companions
Collards grow well with:
- Beets: They don’t compete for nutrients
- Celery: Repels cabbage worms
- Onions: Deter aphids
- Potatoes: Improve soil structure
- Mint: Confuses pests (plant in a container)
Bad Companions
Avoid planting collards near:
- Strawberries: They attract similar pests
- Tomatoes: Compete for nutrients
- Other brassicas: Increases disease risk
- Grapes: Collards can stunt grape growth
Rotate your collard bed every year. Don’t plant them where cabbage, kale, or broccoli grew the previous season.
Frequently Asked Questions
Can I plant collard greens in Kentucky in July?
Yes, July is ideal for fall collards. Plant in mid-July for northern Kentucky and late July for central areas. This gives them time to mature before frost.
What is the latest I can plant collard greens in Kentucky?
The latest safe planting date is mid-August for most of Kentucky. For zone 7a, you can push to late August. Any later risks a poor harvest.
Do collard greens survive winter in Kentucky?
Yes, with protection. Collards can survive light frosts. Heavy mulching and row covers help them through Kentucky winters. Some varieties are more cold-hardy than others.
How often should I water collard greens in Kentucky?
Water once or twice a week, providing 1-1.5 inches total. Increase frequency during dry spells. Kentucky summers can be hot, so check soil moisture regularly.
Can I grow collard greens in containers in Kentucky?
Absolutely. Use a pot at least 12 inches deep and wide. Fill with rich potting soil. Place in full sun. Container collards need more frequent watering than in-ground plants.
Final Tips For Kentucky Collard Growers
Collards are forgiving plants. They tolerate some neglect. But for the best harvest, follow the planting calendar. Kentucky’s climate is perfect for fall collards.
Start with a soil test. Amend as needed. Plant at the right time. Water consistently. Harvest before hard freezes. You’ll have a bountiful supply of greens.
Remember that collards taste better after a frost. Don’t rush to harvest them. Let them experience a few cold nights. The flavor will be noticeably sweeter.
Share your harvest with neighbors. Collards freeze well, so you can enjoy them all winter. Cook them with smoked meat for a classic Southern dish.
Kentucky gardeners have been growing collards for generations. The tradition continues. With these tips, you can join them. Plant at the best time and enjoy fresh, homegrown collards.
Happy gardening. Your collard patch will be the envy of the neighborhood. Just remember to plant six weeks before the first frost. That is the secret to success.