Azur Kohlrabi is a striking heirloom vegetable bred by Germany's Hild Seed Company that brings genuine color drama to the garden with its radiant ultra-violet skin. Inside those glowing purple bulbs lies crisp, juicy white flesh that's surprisingly delicate and sweet. Ready to harvest in just 55 to 65 days, this fast-growing variety reaches its peak flavor at 2 to 3 inches across, offering the tender crunch of a water chestnut paired with the mild sweetness of young cabbage. Cold-hardy enough for zones 3 through 10, it thrives in full sun and moderate moisture, making it accessible to gardeners across most of North America.
Full Sun
Moderate
3-10
3in H x ?in W
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Moderate
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The ultra-violet skin of Azur Kohlrabi practically glows in morning light, making it as much a visual asset in the garden as it is a culinary one. The flavor lives up to the promise of its appearance: sweet, mild, and unexpectedly juicy with a texture that bridges cabbage and water chestnut in the most appealing way. This open-pollinated variety grows quickly without bolting prematurely, and reaches peak eating size at just 2 to 3 inches, allowing you to harvest before the bulbs become woody or overgrown.
Azur Kohlrabi is eaten as a fresh vegetable, typically when the bulbs are young and tender at 2 to 3 inches across. The crisp white flesh can be sliced raw into salads, shredded for slaws, or cooked gently to preserve its delicate sweetness and texture. Its mild flavor and tender bite make it approachable for those who find mature brassicas too assertive, and the stunning purple skin makes it a striking addition to any dinner plate.
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Start seeds indoors 4 to 6 weeks before your last spring frost date at a soil temperature of 65 to 75 degrees Fahrenheit. Sow seeds shallowly, keep soil consistently moist, and provide strong light to prevent leggy seedlings.
Harden off seedlings gradually over 7 to 10 days before transplanting to the garden after the danger of heavy frost has passed. Space transplants 6 inches apart in full sun. Azur Kohlrabi can also be planted in succession throughout late spring and summer for fall harvest.
Direct sow seeds outdoors in early spring or mid-to-late summer for fall harvest, sowing at the temperatures specified for germination.
Harvest Azur Kohlrabi when the bulbs reach 2 to 3 inches across, typically 55 to 65 days after sowing. At this size, the flesh is at its most tender, crisp, and sweet. Check bulbs regularly once they approach maturity, as they can become fibrous and tough if allowed to grow much larger. Cut the bulb from the base with a clean knife, leaving the stem roots in the ground if you plan to allow the plant to regenerate side shoots.
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“Azur Kohlrabi traces its roots to the Hild Seed Company of Germany, a breeding program with deep expertise in Brassica development. As an open-pollinated heirloom, it represents generations of selection for both striking appearance and reliable performance in cool-season gardens. The variety's journey reflects the European tradition of kohlrabi breeding, where German seed companies became known for developing cultivars that balanced ornamental color with exceptional eating quality.”