Biennial vegetable
Kohlrabi plant profile
Brassica oleracea var. gongylodes
A biennial vegetable for full sun.
Last updated .
When to plant
When to plant Kohlrabi
Direct sow
4 weeks before your last spring frost to 2 weeks before your last spring frost
Fall planting
12 weeks before your first fall frost to 8 weeks before your first fall frost
Growing conditions
- Sun
- Full sun
- Water
- 1 in / week
- Planting depth
- 0.5 in
- Soil pH
- 6 to 7.5
- Lifecycle
- Biennial
- Spacing
- 4 to 8 in apart, rows 18 in
- Days to maturity
- 50 to 60 days (from sowing)
Common problems
Watch for these
Evidence trail
Evidence behind this profile
Original extension and institutional publications behind the planting, care, and safety facts on this page.
- Growing Kohlrabi in the Home Garden
Iowa State University Extension and Outreach. Supports direct-sowing timing (normalized), fall direct-sowing timing (normalized), and days to maturity (direct). Checked 2026-06-13.
- Growing kohlrabi in home gardens
University of Minnesota Extension. Supports general reference. Checked 2026-06-13.