When to Plant Kohlrabi in Arkansas (2026 Guide)

Kohlrabi is an interesting and versatile vegetable that has gained popularity among home gardeners, particularly in Arkansas. This unique member of the brassica family forms a swollen bulb-like stem just above the soil, which is not just edible but also delicious and nutritious. With the ability to thrive in cooler temperatures, kohlrabi is an excellent choice for both spring and fall planting in the state, especially given the diverse USDA hardiness zones across Arkansas.

In Zone 6b, the median last spring frost date is April 7, while in Zone 7a, it falls earlier on March 29. These distinctions are critical for optimal planting, management, and eventual harvesting of kohlrabi. This vegetable is known for its crisp texture and mild flavor that resembles a sweeter version of broccoli stem, making it suitable for a variety of culinary applications, from raw slaws to hearty roasts.

Gardening in Arkansas comes with its own challenges, including humidity and late spring frosts, which can affect planting schedules. Keeping track of frost dates and understanding when to start your kohlrabi seeds indoors or transplant them outdoors is essential for a successful harvest. By planning carefully and adapting to local conditions, gardeners can enjoy fresh kohlrabi in their kitchens later in the season.

Planting Schedule by USDA Zone in Arkansas

Zone	Indoor start	Transplant out	Direct sow	Harvest
Zone 6b	Start February 15 – March 1, ~6–8 weeks before April 7	Transplant outdoors between April 8 – April 22, after the frost date	Direct sow from April 8 – April 22 for spring harvest	Harvest from June 1 – June 15 for the best flavor and texture
Zone 7a	Start seeds indoors from March 1 – March 15, ~6–8 weeks before March 29	Transplant outdoors between March 30 – April 14, after the frost date	Direct sow from March 30 – April 14 for spring harvest	Harvest from May 15 – May 30 when bulbs reach ideal size
Zone 6a	Start February 20 – March 6, ~6–8 weeks before April 16	Transplant outdoors between April 17 – May 1, after the frost date	Direct sow from April 17 – May 1 for spring harvest	Harvest from June 1 – June 15 for peak flavor and tenderness

Kohlrabi Planting Windows in Arkansas

Indoor start: Start your kohlrabi seeds indoors roughly 6–8 weeks before the last frost date specific to your zone, which means beginning between February 15 and March 1 in Zone 6b.
Transplant outdoors: Transplant your kohlrabi outdoors between April 8 and April 22 in Zone 6b, ensuring that the danger of frost has passed.
Harvest: You can expect to harvest your kohlrabi from June 1 to June 15, depending on when you transplant.

Common Mistakes Growing Kohlrabi in Arkansas

One common mistake for Arkansas gardeners is timing. Spring can be unpredictable with late frosts, especially in April. It's vital to wait until after the last frost date to avoid losing young plants. Careful monitoring of weather forecasts is essential for successful kohlrabi growth.
Many gardeners in Arkansas may rush to plant kohlrabi too early. Soil temperature is crucial; kohlrabi does not thrive in overly warm soils. Be sure to plant only when conditions are right to help prevent bolting and to optimize bulb development.
Underestimating spacing is another frequent issue. Kohlrabi plants need adequate space to grow without overcrowding. In Arkansas’ humid climate, proper spacing helps prevent air circulation problems, which can lead to diseases like downy mildew.
Ignoring the leaves is a missed opportunity. The leaves of kohlrabi are edible and delicious, similar to kale or collards. Some Arkansas gardeners might discard them, but they can be a nutritious part of meals, reducing waste and adding flavor.
Arkansas’ climate can bring sudden heat waves in late spring. When planning for fall harvests, be cautious with planting dates. Remember, kohlrabi planted too late in warmer areas may develop tougher, more fibrous bulbs. Aim to have fall crops planted early enough to avoid these conditions.

Frequently Asked Questions

What if I'm in a cold pocket of Arkansas?

If you're in a colder area, consider starting your kohlrabi seeds indoors as soon as possible. This gives you a head start and allows for proper transplanting once the danger of frost has passed. Monitor local weather closely, as these areas may experience longer winters.

Can I still plant kohlrabi in May?

Planting kohlrabi in May is not advisable in most of Arkansas due to heat. However, if you want to risk it, focus on heat-tolerant purple varieties. It's better to plant earlier in the spring to avoid tough, woody bulbs that can develop in warmer temperatures.

How will humidity affect my kohlrabi?

Humidity can affect kohlrabi by promoting disease, especially if plants are overcrowded. To combat this, ensure proper air circulation around plants and consider using fungicides if you notice fungal issues. Monitoring soil moisture is key to healthy growing conditions.

What's the best way to harvest kohlrabi?

Harvest kohlrabi when the bulbs are about 3 inches in diameter for optimal taste and texture. Be gentle while pulling them out, as they can be sensitive. Use pruning shears to cut them off at the base, and don’t forget to collect the leaves as well!

Can kohlrabi be grown year-round in Arkansas?

In Arkansas, kohlrabi is best suited for spring and fall planting. While it can tolerate some frost, summer heat can adversely affect growth. To ensure successful cultivation, follow the seasonal timings according to your local zone.

Keep Learning

Typical fall sowing window for Kohlrabi in Arkansas: August 16 – September 6.