Zone-Specific Guide
Grow Kohlrabi in Zone 4a
Your complete guide to growing kohlrabi in USDA Hardiness Zone 4a — planting windows, care tips, and harvest timing.
Spring/Fall
🌡️ Zone 4a
Days to Harvest
45–60
Spacing
6–10"
Method
Both
Season
Spring/Fall
When to Plant Kohlrabi in Zone 4a
Start Indoors
Mar 1 – Apr 1, Jul 1 – Aug 1
Transplant Outdoors
May 1 – Jun 1, Aug 1 – Sept 1
Direct Sow
Apr 15 – Jun, Aug – Sept
How to Grow Kohlrabi in Zone 4a
📋 Key Timing Note
Spring and fall windows. Fall planting often produces better heads — less pest pressure.
Start seeds indoors during Mar 1 – Apr 1, Jul 1 – Aug 1. Transplant seedlings outdoors between May 1 – Jun 1, Aug 1 – Sept 1. Direct sow seeds between Apr 15 – Jun, Aug – Sept. Space plants 6–10" apart. Expect to harvest in approximately 45–60 days.
Common Pests in Zone 4a
Watch for these pests when growing kohlrabi in your area.
Frequently Asked Questions
When should I plant Kohlrabi in Zone 4a?
Start seeds indoors Mar 1 – Apr 1, Jul 1 – Aug 1. Transplant outdoors May 1 – Jun 1, Aug 1 – Sept 1.
How far apart should I plant Kohlrabi in Zone 4a?
Space kohlrabi plants 6–10" apart in Zone 4a. This gives them adequate room for airflow and root development.
What pests affect Kohlrabi in Zone 4a?
Common pests for kohlrabi in Zone 4a include cabbage worms, aphids. Use companion planting and row covers as first-line defense.
How long until Kohlrabi is ready to harvest in Zone 4a?
In Zone 4a, expect kohlrabi to be ready in approximately 45–60 days from planting. Spring and fall windows. Fall planting often produces better heads — less pest pressure.