When to Plant Kohlrabi in Texas (2026 Guide)
Kohlrabi is a unique addition to any Texas garden, providing a sweet, mild flavor that reminds many of broccoli stems. Ideal for both early spring and fall planting, this brassica can be a delightful and unusual crop to grow. Texas gardeners can maximize their harvest by understanding the appropriate planting and sowing dates specific to their USDA hardiness zone, which influences the growing season considerably.
In Texas, you’ll want to pay attention to your last frost date. For instance, gardeners in Zone 8b–9a, which includes cities like Alice and Alvin, experience their median last spring frost on February 13. This is crucial to plan your kohlrabi planting effectively. Similarly, Zone 7b–8a areas, such as Austin, have a later frost date of March 4, offering a slightly longer window for outdoor planting.
Kohlrabi is a quick-growing vegetable, typically maturing in just 45 to 60 days from transplant. Thus, planning is key to ensure you pick your kohlrabi bulbs at the ideal size of around three inches in diameter. Be mindful of your local climate, as Texas conditions, such as humidity and varying temperatures, can affect the growth and timing of this unique vegetable.
Planting Schedule by USDA Zone in Texas
| Zone | Indoor start | Transplant out | Direct sow | Harvest |
|---|---|---|---|---|
| Zone 7b–8a | Start January 15 – February 15, ~6–8 weeks before March 4 | Transplant outdoors March 5 – March 20, after frost threat is over | Direct sow outdoors March 5 – March 20, after the last frost date | Harvest from April 15 – June 15, when bulbs reach 3 inches in diameter |
| Zone 8b–9a | Start December 15 – January 15, ~6–8 weeks before February 13 | Transplant outdoors February 14 – March 1, after frost threat is over | Direct sow outdoors February 14 – March 1, post-last frost | Harvest from April 1 – May 15, when bulbs reach 3 inches in diameter |
| Zone 7a | Start January 20 – February 20, ~6–8 weeks before March 20 | Transplant outdoors March 21 – April 5, after frost threat is over | Direct sow outdoors March 21 – April 5, after final frost date | Harvest from May 1 – June 10, when bulbs reach 3 inches in diameter |
Kohlrabi Planting Windows in Texas
- Indoor start: For most areas in Texas, start kohlrabi indoors from December 15 to January 15 for the best results.
- Transplant outdoors: Transplant your kohlrabi outdoors depending on your zone: either March 5–20 or February 14–March 1.
- Harvest: The ideal harvest window for kohlrabi is from April 1 to June 15, ensuring you pick the bulbs when they reach about 3 inches in diameter.
Common Mistakes Growing Kohlrabi in Texas
- Many Texas gardeners underestimate the importance of specific frost dates. Planting too early, before March 4 or February 13, can result in crop failure due to frost damage. Timing is everything for successful kohlrabi growth.
- Overcrowding kohlrabi is a common mistake. Although kohlrabi can fill in gaps, give it enough room to grow. Poor spacing can lead to disease and smaller bulbs that don’t reach their full potential.
- Texas heat can be unforgiving, and kohlrabi that grows during warmer months can turn woody if not monitored. Check the forecast and mulch as necessary to protect your plants, especially as temperatures start to rise.
- Ignoring companion planting principles can result in underwhelming yields. In Texas, kohlrabi can be interplanted effectively with slower-growing crops, helping maximize garden space. It’s essential to plan garden layouts strategically.
- New gardeners may overlook the leaves of kohlrabi, which are also edible. The nutritious greens can enhance dishes and should not be discarded. Texas cooks can enjoy them in sautés and soups for added flavor.
Frequently Asked Questions
What if I'm in a cold pocket of Texas?
If you're in a colder area, it's essential to monitor temperatures carefully. You might need to wait until closer to your last frost date. Using row covers can help protect your kohlrabi from unexpected cold snaps.
Can I still plant kohlrabi in May?
Planting kohlrabi in May is generally too late in Texas, as the heat can affect the bulb's texture and flavor negatively. It's best to stick to early spring or late summer for fall crops.
How do I know when to harvest kohlrabi?
Harvest kohlrabi when the bulbs reach about 3 inches in diameter for the best flavor and texture. You can pull them anytime up to 4 inches, but larger bulbs may become woody and fibrous.
What varieties of kohlrabi should I choose?
Choosing between green and purple kohlrabi often depends on your taste preference and the climate. Purple varieties tend to be more heat-tolerant, making them a preferred choice for warmer areas in Texas.
Can I eat the leaves of kohlrabi?
Absolutely! The leaves of kohlrabi are edible and can be cooked like kale or collard greens. Don't throw them away; they add extra nutrition and flavor to your meals!
Keep Learning
City guides in Texas
Other crops in Texas
Typical fall sowing window for Kohlrabi in Texas: September 8 – September 29.