When to Plant Kohlrabi in Alabama (2026 Guide)
Kohlrabi is an excellent addition to your Alabama garden, with its crisp texture and sweet flavor. Whether you prefer the pale green or purple variety, this versatile brassica can thrive in Alabama's climate. With the average last spring frost on April 3 in Zone 6b and March 4 in Zone 7b-8a, it's essential to know when to plant your kohlrabi for a successful harvest.
This cool-season crop typically takes just 45 to 60 days to reach maturity, making it perfect for both spring and fall planting. By sowing kohlrabi at the right times, you'll enjoy the freshest flavors in salads, slaws, or as roasted sides. Understanding your local frost dates will help you plan effectively, whether you're in Birmingham or Dothan.
To get the most out of your kohlrabi, consider the high humidity and heat that can occur later in the spring in Alabama. It’s important to protect these crops from harsh mid-summer temperatures that can negatively affect their growth. By knowing the right times to plant and harvest, you can ensure a bountiful kohlrabi yield.
Planting Schedule by USDA Zone in Alabama
| Zone | Indoor start | Transplant out | Direct sow | Harvest |
|---|---|---|---|---|
| Zone 6b | Start February 15 – March 1, ~6–8 weeks before April 3 | Transplant outdoors April 10 – April 20, after frost risk | Direct sow April 10 – May 1, after frost risk | Harvest June 1 – June 15, bulbs ~3 inches wide |
| Zone 7b–8a | Start January 20 – February 20, ~6–8 weeks before March 4 | Transplant outdoors March 10 – March 20, after frost risk | Direct sow March 10 – April 10, after frost risk | Harvest May 1 – May 15, bulbs ~3 inches wide |
| Zone 7a | Start February 15 – March 1, ~6–8 weeks before March 30 | Transplant outdoors March 25 – April 5, after frost risk | Direct sow March 25 – April 10, after frost risk | Harvest May 15 – May 30, bulbs ~3 inches wide |
Kohlrabi Planting Windows in Alabama
- Indoor start: Start seeds indoors from February 15 to March 1, depending on your zone.
- Transplant outdoors: Transplant outdoors from April 10 to April 20 for Zone 6b and from March 10 to March 20 for Zones 7b-8a.
- Harvest: Harvest kohlrabi from May 1 to June 15, keeping an eye on bulb size.
Common Mistakes Growing Kohlrabi in Alabama
- One common mistake gardeners make in Alabama is planting kohlrabi too late, especially in warmer areas like Dothan. This can lead to woody, less flavorful bulbs.
- Some gardeners fail to account for Alabama's fluctuating humidity levels, which can cause kohlrabi to bolt prematurely. Managing moisture levels is essential for healthy growth.
- Another mistake is overlooking the importance of soil quality. Alkaline and clay soils prevalent in many parts of Alabama can hinder kohlrabi growth. Soil amendments may be necessary.
- Many Alabama gardeners try to grow kohlrabi in the heat of summer without proper timing. Instead, focus on spring and fall crops to avoid the stress of high temperatures.
- It's a mistake to discard kohlrabi leaves without realizing their culinary value. In Alabama's climate, the greens can be a nutritious addition to your meals, increasing your yield.
Frequently Asked Questions
What if I'm in a cold pocket of Alabama?
If you're in a colder area, wait a few extra days after the last frost before planting outdoors. This ensures kohlrabi has the best chance to thrive.
Can I still plant kohlrabi in May?
Planting kohlrabi in May is possible but not recommended in most of Alabama due to rising temperatures, which can cause it to bolt before reaching maturity.
Are kohlrabi bulbs safe to eat when they're overripe?
While they can be eaten, overripe kohlrabi will have a woody texture and less pleasant taste. Aim to harvest when bulbs are around 3 inches in diameter.
How do I prepare kohlrabi for cooking?
Peel the tough skin and slice kohlrabi into thin pieces or matchsticks for use in salads or cooked dishes. Its mild flavor adapts well to various recipes.
Can I grow kohlrabi through the summer in Alabama?
It's best to avoid summer planting in Alabama due to heat stress, which can hinder growth and flavor. Instead, focus on spring and fall crops for optimal results.
Keep Learning
City guides in Alabama
Other crops in Alabama
Typical fall sowing window for Kohlrabi in Alabama: September 3 – September 24.