How to Grow Kohlrabi

Beginner-Friendly

Brassica oleracea var. gongylodes

A fast-growing cool-season brassica producing a swollen above-ground stem with mild, crisp flesh similar to broccoli stems. Both green and purple varieties available. Harvest while young for best texture.

Last updated: June 2026

Days to Maturity
45–60 days
typical
Per Square Foot
1
Plant Spacing
23 cm / 9"
Sun
6+ hours
Water
1.0" / 25 mm
Fertilization
moderate feeder

Growing Notes

Start indoors 5 weeks before last frost or direct sow. Harvest when bulbs reach 5–7 cm diameter — they become woody if left too long. Tolerates light frost well.

Popular Varieties

5 kohlrabi cultivars in our catalog.

Azur Star
Open-Pollinated
Support
none
Harvest
once
Early White Vienna
55–55 days Hybrid
Avg fruit
0.1 oz (2 g)
USDA Zones
3–9
Kolibri
Hybrid
Support
none
Harvest
once
Seed viability
3 years
Konan
Hybrid
Seed viability
3 years
Superschmelz or Giant White
Open-Pollinated
Support
none
Harvest
once
Seed viability
3 years

Square Foot Spacing

1 per sq ft

12" apart (entire square)

View full spacing chart →

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