Arkansas gardeners plant kale in early spring or late summer for two productive seasons. Knowing the best time to plant kale in arkansas ensures you get tender leaves before the heat or frost hits. This guide walks you through every detail for a successful kale crop in The Natural State.
Kale thrives in cool weather. In Arkansas, that means you have two windows: one in spring and one in fall. Each season has its own rules and rewards.
Best Time To Plant Kale In Arkansas
The ideal planting dates depend on your specific region within Arkansas. The state spans USDA hardiness zones 6a in the north to 8a in the south. This affects when soil temperatures are right.
For spring planting, aim for 3 to 4 weeks before the last expected frost. In northern Arkansas, that’s typically mid-March. In southern parts, late February to early March works well.
For fall planting, count back 6 to 8 weeks from the first expected frost. Northern areas target late July to early August. Southern areas can plant through early September.
Spring Planting Window
Spring-planted kale gives you harvests from late spring into early summer. The key is to get seeds or transplants in the ground while nights are still cool.
- Northern Arkansas (zones 6a-6b): March 15 to April 1
- Central Arkansas (zones 7a-7b): March 1 to March 20
- Southern Arkansas (zones 8a): February 20 to March 10
Soil temperature should be at least 40°F for seed germination. Kale seeds can sprout in soil as cold as 35°F, but germination is slower. Use a soil thermometer to check.
Fall Planting Window
Fall-planted kale is often sweeter. Cool nights convert starches to sugars, giving leaves a milder flavor. This crop can survive light frosts.
- Northern Arkansas: July 25 to August 10
- Central Arkansas: August 1 to August 20
- Southern Arkansas: August 15 to September 5
Fall planting requires careful timing. You want plants to mature before hard freezes, but not bolt from summer heat. Start seeds indoors if late summer is too hot.
Factors That Affect Planting Time
Several variables influence the exact date. Pay attention to these factors for best results.
Soil Temperature
Kale seeds germinate best between 45°F and 75°F. In Arkansas spring, soil warms slowly. Use black plastic mulch to speed warming if you plant early.
For fall, soil can be too hot in August. Shade cloth or planting in partial shade helps. Water deeply to cool the ground before seeding.
Frost Dates
Your local frost dates matter more than calendar dates. Check your county extension office for precise data. In general:
- Last spring frost: March 20 to April 15 (north to south)
- First fall frost: October 15 to November 5 (north to south)
Kale can handle light frosts down to 25°F. Heavy freezes below 20°F may damage leaves. Use row covers for protection.
Variety Selection
Different kale varieties have different maturity times. This affects when you should plant.
- Dwarf Siberian: 50 days to harvest, good for spring
- Lacinato (Dinosaur): 60 days, excellent for fall
- Red Russian: 50 days, sweet after frost
- Vates: 60 days, very cold hardy
Choose faster-maturing varieties for spring planting. Slower varieties work better for fall, as they benefit from cooling temperatures.
Step-By-Step Planting Guide
Follow these steps for a successful kale crop in Arkansas.
Step 1: Prepare The Soil
Kale needs well-drained soil rich in organic matter. Test your soil pH first. Kale prefers pH between 6.0 and 7.5.
- Remove weeds and debris from the bed.
- Add 2-3 inches of compost or aged manure.
- Work in a balanced fertilizer (10-10-10) at 1 pound per 100 square feet.
- Rake the bed smooth.
Step 2: Sow Seeds Or Transplants
Direct seeding is common for kale. Transplants give you a head start.
For seeds:
- Sow 1/4 to 1/2 inch deep.
- Space seeds 2 inches apart in rows 18 inches apart.
- Thin seedlings to 12-18 inches apart when they have 4 true leaves.
For transplants:
- Harden off plants for 5-7 days before planting.
- Set transplants 12-18 inches apart.
- Water well after planting.
Step 3: Water Consistently
Kale needs about 1-2 inches of water per week. In Arkansas summers, you may need to water more often.
- Water deeply at the base, not overhead.
- Use drip irrigation or soaker hoses.
- Mulch around plants to retain moisture.
Step 4: Fertilize During Growth
Kale is a heavy feeder. Side-dress with nitrogen fertilizer every 3-4 weeks.
- Use fish emulsion or blood meal for organic options.
- Apply 1/4 cup of 21-0-0 per 10 feet of row.
- Water in after fertilizing.
Step 5: Harvest Correctly
Start harvesting outer leaves when plants are 8-10 inches tall. Leave the inner rosette to continue growing.
- Harvest from the bottom up.
- Pick leaves when they are 4-6 inches long.
- Stop harvesting if plants start to bolt (flower).
In spring, harvest before temperatures consistently exceed 80°F. In fall, you can harvest until hard freezes.
Common Mistakes To Avoid
Arkansas gardeners often make these errors. Avoid them for better yields.
Planting Too Late In Spring
Kale planted after April in most of Arkansas will bolt quickly. The heat triggers flowering and bitter leaves. Stick to early spring dates.
Planting Too Early In Fall
August heat can kill young kale plants. Use shade cloth or plant in a spot that gets afternoon shade. Water deeply every day during heat waves.
Overcrowding
Kale needs space for air circulation. Crowded plants get powdery mildew. Thin seedlings ruthlessly.
Ignoring Pests
In Arkansas, cabbage worms and aphids love kale. Use row covers to exclude pests. Check undersides of leaves regularly.
- Handpick cabbage worms.
- Spray neem oil for aphids.
- Attract beneficial insects with dill and fennel.
Regional Tips For Arkansas
Arkansas has three distinct growing regions. Adjust your planting accordingly.
Northern Arkansas (Ozarks)
Higher elevation means cooler nights. Spring planting can start a week earlier than other northern areas. Fall planting should be earlier too.
- Spring: March 10-25
- Fall: July 20-August 5
- Use cold frames for extended harvests.
Central Arkansas (River Valley)
Hot summers and mild winters. Spring planting is your best bet. Fall planting requires careful timing to avoid August heat.
- Spring: March 1-15
- Fall: August 10-25
- Consider shade cloth for fall starts.
Southern Arkansas (Delta)
Long growing season but intense heat. Focus on fall planting for best quality. Spring kale may bolt quickly.
- Spring: February 20-March 5
- Fall: August 20-September 5
- Use heat-tolerant varieties like Red Russian.
Extending The Season
You can harvest kale nearly year-round in Arkansas with some effort.
Cold Frames
A cold frame lets you plant 2-3 weeks earlier in spring and harvest 4-6 weeks later in fall. Build a simple wooden frame with a glass or plastic lid.
- Place cold frame facing south.
- Vent on warm days to prevent overheating.
- Add insulation on cold nights.
Row Covers
Floating row covers protect from frost and pests. They add 5-10°F of warmth. Use lightweight covers for spring and heavier ones for fall.
Winter Harvest
In southern Arkansas, kale can survive winter with protection. Mulch heavily around plants. Use a low tunnel or cloche for extra warmth.
In northern Arkansas, kale may die back in hard freezes. But you can still harvest from cold frames or unheated greenhouses.
Best Kale Varieties For Arkansas
Choose varieties proven to perform well in Arkansas conditions.
| Variety | Days to Maturity | Best Season | Notes |
|---|---|---|---|
| Dwarf Siberian | 50 | Spring | Compact, heat tolerant |
| Lacinato | 60 | Fall | Sweet after frost |
| Red Russian | 50 | Fall | Cold hardy, tender |
| Vates | 60 | Both | Very hardy, slow to bolt |
| Winterbor | 60 | Fall/Winter | Survives to 0°F |
Soil Preparation Details
Good soil is the foundation of a great kale crop. Arkansas soils vary widely.
Clay Soils
Much of Arkansas has heavy clay. Improve drainage by adding organic matter.
- Add 4-6 inches of compost.
- Use raised beds for better drainage.
- Plant on ridges or mounds.
Sandy Soils
In river valleys, sandy soils drain too fast. Add organic matter to retain moisture.
- Mix in peat moss or coconut coir.
- Mulch heavily to reduce evaporation.
- Water more frequently.
Rocky Soils
In the Ozarks, rocky soil is common. Remove large rocks and build up beds with imported soil.
- Use containers or raised beds.
- Add lime if soil is acidic.
- Test soil annually.
Watering Schedule
Consistent moisture prevents bitter leaves and bolting. Follow this schedule for Arkansas conditions.
Spring Planting
- Water every 2-3 days if no rain.
- Reduce to once a week after plants are established.
- Stop watering 2 weeks before first frost.
Fall Planting
- Water daily during hot August weather.
- Reduce to every 3-4 days in September.
- Water deeply once a week in October.
Pest And Disease Management
Arkansas humidity encourages diseases. Keep plants healthy with these tips.
Common Pests
- Cabbage worms: Use Bt (Bacillus thuringiensis).
- Aphids: Spray with insecticidal soap.
- Slugs: Set out beer traps or use diatomaceous earth.
- Flea beetles: Use row covers.
Common Diseases
- Powdery mildew: Space plants for air flow.
- Downy mildew: Avoid overhead watering.
- Black rot: Rotate crops every 3 years.
Harvesting And Storage
Harvest at the right time for best flavor. Store properly to extend shelf life.
When To Harvest
- Spring: Harvest when leaves are 4-6 inches long.
- Fall: Wait until after a light frost for sweeter flavor.
- Winter: Harvest on mild days above freezing.
How To Store
- Wash and dry leaves thoroughly.
- Wrap in damp paper towels.
- Store in a plastic bag in the refrigerator.
- Use within 5-7 days.
Kale also freezes well. Blanch leaves for 2 minutes, then freeze in bags.
Frequently Asked Questions
Can I Plant Kale In Arkansas In The Summer?
Summer planting is risky due to heat. If you try, choose heat-tolerant varieties and provide shade. Expect smaller yields and bitter leaves.
What Is The Best Month To Plant Kale In Arkansas?
For spring, March is best statewide. For fall, August works for most areas. Adjust based on your local frost dates.
How Late Can I Plant Kale In Arkansas?
For fall, plant no later than early September in southern Arkansas. In northern areas, late August is the cutoff. Later plantings may not mature before hard freezes.
Does Kale Need Full Sun In Arkansas?
Kale prefers full sun (6-8 hours) in spring and fall. In summer, partial afternoon shade helps prevent bolting. Morning sun with afternoon shade works well.
Can I Grow Kale Year-round In Arkansas?
With protection like cold frames or row covers, you can harvest kale from fall through spring. Summer heat usually stops production. Focus on spring and fall crops.
Final Tips For Success
Planting at the right time is only half the battle. Follow these final tips for a bumper crop.
- Rotate kale with non-brassica crops each year.
- Test soil every 2-3 years.
- Keep a garden journal of planting dates and results.
- Join a local gardening group for regional advice.
- Start seeds indoors for fall planting to avoid heat stress.
Kale is one of the easiest greens to grow in Arkansas. With proper timing, you can enjoy fresh kale for months. The best time to plant kale in arkansas gives you two distinct seasons, each with its own advantages. Spring planting provides early harvests, while fall planting delivers sweeter leaves. Pay attention to your local conditions, and you will be rewarded with a steady supply of nutritious greens.
Remember that Arkansas weather can be unpredictable. A late frost in spring or an early freeze in fall can disrupt your plans. Always have row covers ready. With a little preparation, you can extend your harvest well beyond the typical season.
Start with a small patch this year. Experiment with different varieties and planting dates. You will quickly learn what works best in your specific garden. Kale is forgiving and resilient, making it a perfect crop for both beginners and experienced gardeners in Arkansas.