Azur Star

Family: Brassicaceae Vegetable

Sweetly crisp and vividly tender, Azur Star kohlrabi forms a striking blue-tinged globe that feels cool and juicy at first bite.

Its pale interior is fine-grained and pleasantly mild, with a clean, cabbage-kissed snap that holds up beautifully for fresh use and quick pickling. Grow this standout for a garden-to-plate centerpiece—an eye-catching bulb that matures in about 55 days and delivers consistently uniform, market-ready shapes.

Light: Full SunMaturity: 55 DaysHabit: Rosette

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

Milestone	Date
Start Indoors	Mar 28th
Last Frost	Apr 25th
Transplant / Sow Outdoors	Apr 18th
Harvest Begins	Jun 12th
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	55
Sun Requirements	Full Sun
Growth Habit	Rosette
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	45
Min Soil Temp (°F)	40
Min Night Temp (°F)	35
Harden Off (days)	6

Culinary Notes

Chef's Note

Azur Star is built for texture: when it’s young, the interior stays fine and juicy, so it reads as sweet-crisp rather than cabbagy. Slice it paper-thin for maximum snap or pickle it fast, and it’ll stay assertive instead of going soft.

Best Uses

thin-sliced raw salads where it stays snappy
quick pickle (short brine, high-vinegar punch) for tangy crunch
shaved kohlrabi with a hot-but-light vinaigrette (holds its texture)
quick sauté/steam-then-toss so it blanches tender without turning starchy

Flavor Profile

cool, juicy crunch mild, cabbage-kissed sweetness fine-grained, tender snap clean brassica finish with no harsh bite when young

Kitchen Pairings

lime butter or browned butter mustard (whole-grain or Dijon) ricotta salata or feta hazelnut oil smoked salmon

Frequently Asked Questions

Why are my Azur Star leaves turning yellow and getting sticky, and what should I do?

Sticky leaves plus yellowing is often aphids, which feed on azur star foliage and can also lead to sooty mold. Rinse plants with a strong jet of water, then spray insecticidal soap (especially undersides) and repeat every 5–7 days until you stop seeing aphids.

How often should I water Azur Star during the main growing phase?

During active growth (after seedlings establish), water deeply about 1–2 times per week to keep the root zone evenly moist, not waterlogged. Aim for soil that feels slightly dry at the surface (top 1 inch) before you water again, and reduce watering if your soil stays wet or cold.

How can I tell when Azur Star is ready to harvest?

Harvest around 55 days from sowing when pods/fruit are at their mature size and color for Azur Star, and the plant looks fully developed rather than soft and rapidly growing. If it’s a quick-maturing type where you can check by feel, pick when the produce is firm and easily separates from the stem without tearing.