Growing Kohlrabi: The Hearty, Above-Ground Root

I have so many fond memories of my summers as a youth. Perhaps the most delicious is the memory of watching my Danish grandmother strip away the tough outside layers of a freshly-pulled kohlrabi.

Vertical image of a striking purple kohlrabi bulb growing out of rich dirt. Green leaves reside atop purple stalks emerging from the bulb. Numerous green leaves are in the background.

She would then slice the inside flesh into circular “chips,” which she would serve to us with a sprinkling of salt.

This amazing treat was the reason for my insistence as an adult that we have kohlrabi in our own gardens. The lovely cabbage flavor and crisp, juicy texture is strikingly similar to the way the inside of a broccoli stem tastes.

It can even be difficult to distinguish a newly planted kohlrabi from its broccoli and cabbage cousins.

But this is where the similarity ends. The above-ground root plant focuses all of its plant energy into one large bulbous mass.

German for “cabbage turnip,” kohlrabi brings beautiful flavor in an easily harvested plant that is surprisingly resistant to insects.

Veggie Varieties

There are two basic variations of this plant.

The purple varieties are beautiful in color, both at the edible fleshy stem and in the luxurious leaves.

A large, bulbous kohlrabi plant grows from the earth. Many grey-green leaves emerge from the base of the plant.

The white type is actually light green, and the type we are most accustomed to seeing in stores and at farmer’s markets.

Favored cultivars of the plant include:

Purple Vienna

This selection has beautiful leaves and is quite decorative. It can be used as a bright addition to any yard or garden.

A close up square image of a 'Purple Vienna' kohlrabi growing in the garden surrounded by salad greens. To the bottom right of the frame is a white circular logo with text.

‘Purple Vienna’

It’s ready to harvest in 60 days.

Seeds are available from True Leaf Market.

Konan

There is nothing barbaric about this ‘Konan!’ An All-America Selections winner in the edibles category in 2016, this hybrid cultivar produces four to six-inch pale green bulbs with a sweet, tangy flavor.

A close up square image of a 'Konan Hybrid' kohlrabi growing in the garden pictured on a soft focus background.

‘Konan’

Ready to harvest in just 45 days, ‘Konan’ is ideal for growing in containers, with a mature height of 12-18 inches.

You can find seeds available at Burpee.

Early White Vienna

‘Early White Vienna’ is an heirloom variety that dates back to the 19th century. The two-inch bulbs have crisp, juicy flesh and are ready to harvest in 55 days.

A close up square image of 'Early White Vienna' kohlrabi set on a wooden surface. To the bottom right of the frame is a white circular logo with text.

‘Early White Vienna’

Best eaten when small, the pale flesh of this cultivar is tender and sweet!

You can find seeds available at True Leaf Market.

Proper Planting Tips

Kohlrabi loves cool weather and moisture, so ensure that the soil is slightly damp when you are planting the seeds.

Young kohlrabi plants can be difficult to distinguish from broccoli and cabbage | GardenersPath.com

I like to plant around the end of April, with plenty of time to grow before the weather gets too hot.

Most varieties take about 8 weeks from sowing to harvesting, so be certain that hot temps won’t arrive before it’s time to pick.

In The Victory Garden Cookbook, author Marian Morash recommends that a clump of seeds be spaced about 4 inches apart, then thinned to just one plant at each 4-inch interval.

The Victory Garden Cookbook, available on Amazon

I have found that one seed usually does well, though. And if I’m short on seeds, I plant one seed per hole at about three inches and still have a good harvest.

I push them just barely below the soil surface with my index finger before smoothing over with topsoil. The directions on the packaging will provide additional insight on best practices.

The Right Size for Picking?

Kohlrabi fans have had differing views on the right time to pick.

I have always been of the thought that “bigger is better” and like to see each plant give me as much food as possible.

Once harvested, it’s unlikely that you’ll see anything more come from that same plant – especially if you’ve reached hot temperatures for the season.

Low-in-sky sunlight strikes a yellow-green kohlrabi bulb from which numerous leaf stalks grow.

There are some, however, who love the smaller, sweeter bulbs, and prefer to pick at 1-2 inches across. These tiny treats are some of the most flavorful and sweet goodies I’ve had from a garden.

If you want quality over quantity, picking small certainly has its rewards!

Whichever you choose, note that the fibrous outside of the bulbs will likely need to be removed before eating.

You can cut the kohlrabi at the base, leaving the root in the ground, or pull the entire plant. If you want to continue to harvest leaves, you may want to choose the cutting method.

Don’t Toss Those Leaves

Kohlrabi leaves are delicious! Small ones taste the best, and you may wish to set a few plants aside just for salads and sautés.

Note that the plants used for leaves will not produce bulbs as large as those which are left alone. Like kale, leaves are best with the tough, stemmy material – or “ribs” – removed.

The Second Year

This plant is a biennial, which means it really has two years to live. Since most people harvest the first year and don’t leave much behind, it usually never sees that second year.

If you’d like to use kohlrabi as a decorative plant or just harvest the leaves, you might consider putting it in a raised bed and leave the bulbous stem alone.

Kohlrabi produces amazing flowers in its second year and is a popular choice for seed savers.

By bringing the plant inside to be stored at the end of the first growing season, it can be overwintered. The following spring, it can be planted to realize its full second-year potential – including flowers and seeds for future years’ planting!

Multiple Plantings Are Best

Like many other members of the cabbage family, it’s a good idea to do many plantings in a season. A couple of spring rows, spaced a week apart, can ensure yummy harvests at various bulb sizes.

Take a break in the hot July and August weather; resume with fall plantings in early September.

In colder zones, such as where I live, everything must be harvested before the first big cold snap. Kohlrabi stores well in a root cellar, much like turnips, beets, rutabagas, and parsnips. They can be kept for up to three months, if in good condition.

If you live in the warmer southern regions, however, you can get by with leaving them in the ground all winter. Just cover with straw or mulch when it starts approaching freezing morning temps. Continue to harvest throughout the season!

The Case for Kohlrabi

I highly recommend giving this ugly but nutritious plant a try.

A yellow-green kohlrabi is shown sliced on a cutting board, accompanied by a paring knife and an upright whole kohlrabi.

It may seem intimidating to deal with an above-ground root at first, but the benefits are many.

In addition to tasting fantastic, the “German cabbage turnip” is also high in fiber and essential nutrients: vitamin C, B6, and all those metallic nutrients from the soil.

Recipe Ideas

Don’t forget to check out these four fantastic recipe ideas.

Fried Kohlrabi with Cilantro Yogurt Sauce

This tasty dish is made made with fried chunks of your new favorite “ugly” veggie, and it’s sure to put a smile on the faces of the entire family.

Fried kohlrabi with cilantro and yogurt sauce. Close up.
Photo by Kendall Vanderslice. © Ask the Experts, LLC.

These can be served with ketchup or the included recipe for cilantro yogurt dipping sauce.

Try it as an appetizer, or even as the main course for a Meatless Monday dinner.

Get the recipe on our sister site, Foodal.com.

Pork Chops with Apple Kohlrabi Slaw

This super quick recipe is a great way to get supper on the table in short order.

Pork Chops with Apple-Kohlrabi Slaw
Photo by Jenni Ward © The Gingered Whisk. Used with permission.
The pork chops are seasoned simply with just salt and pepper. And the slaw provides that flavor profile that merges with the pork to produce something extra specialGet the recipe at the The Gingered Whisk.

Spicy Spiralized Kohlrabi Slaw

Here’s another great slaw-based recipe that does amazing things with this nutritious brassica.

Spiralized kohlrabi slaw with crushed peanuts and a cilantro garnish.
Photo by Nikki Cervone. © Ask the Experts, LLC.

Use vegetable spirals in place of noodles and make a veggie based crisp “pasta” dish that even a caveman could love.

Get the recipe now on Foodal.

Cream of Kohlrabi Soup (Vegan-Friendly)

Although it might not look that appetizing, this creamed soup is made with sweet caramelized onions and coconut milk that gives it a tasty tang that you’ll love.

A bowl of vegan cream of kohlrabi soup.
Photo by Kendall Vanderslice. © Ask the Experts, LLC.

It’s great as a before dinner appetizer at your next house party, or an excellent healthy lunch.

Get the skinny on Foodal.

For more information on storing and using this “ugly” root, check out the complete guide.

Will you be trying this plant in your garden? Do you prefer the luscious purple, or classic green? Let us know in the comments below!

And for more information about growing kohlrabi in your garden, check out these guides next:


Don’t forget to Pin It!

Don’t be intimidated by its strange appearance. Kohlrabi is the perfect root for beginning gardeners and it’s delicious, too. Learn the best planting, harvesting, and storage tips now with our growing guide on Gardener’s Path.

Photos by Kendall Vanderslice and Nikki Cervone. © Ask the Experts, LLC. ALL RIGHTS RESERVED. See our TOS for more details. Product photos via Burpee and True Leaf Market. Uncredited photos: Shutterstock.

About Linsey Knerl

Born and raised in a small Nebraska town, Linsey Knerl is a homeschooling mother of six who enjoys blogging and working hard on her 3 1/2-acre Nebraska homestead. When she’s not working on her next fantasy novel, you will find her in her kitchen, perfecting the Danish recipes of her grandmother with those special ingredients you can only find in a backyard garden.

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Rebecca McCaslin
Rebecca McCaslin (@guest_6007)
7 months ago

Boo Hoo(sob sob) Our Kohlrabi is in flower with tall stem and yellow flowers, very pretty but of the 6, which we planted in 3 gal. planters (to protect from the gopher varmints) none of them produced a bulb, so far. Do we leave in the buckets for longer? This is San Diego,CA, and early March is the tail end of our winter garden. HELP.

Allison Sidhu
Allison Sidhu (@allison-sidhu)
Admin
Noble Member
Reply to  Rebecca McCaslin
7 months ago

Do you have each of these growing individually in its own planter, or are all six plants growing in one 3-gallon container? A variety of factors can stress kohlrabi plants and cause them not to bulb, including overwatering or drought, lack of sunlight, too much nitrogen in the soil, and overcrowding. Providing 18 inches of space between these plants is recommended, and they need well-draining, fertile soil. Since this is a cool-weather crop, it can be more difficult to grow in southern locations with warmer climates. A sudden cold snap can lead to flowering, and unfortunately your plants won’t produce… Read more »