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When to Plant Komatsuna in Northwest Territories

Komatsuna (Japanese mustard spinach) is a versatile Asian green with glossy, dark leaves and a mild, sweet flavor. It is extremely cold-hardy and heat-tolerant.

Northwest Territories spans USDA hardiness zones 2b, 3a (with planting data available), so planting dates vary by your location within the state. Click your zone below for the most accurate dates.

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Click your county for exact Komatsuna planting dates based on your local frost dates.

Komatsuna Planting Calendar for Northwest Territories

โ–ธ Zone 2b ~111 day growing season ยท Full guide โ†’

Last frost: May 22 ยท First frost: September 10 ยท 111 day season

Activity When Date Range
Start Indoors April 10 Apr 10 โ€“ Apr 24
Transplant Outdoors May 22 May 22 โ€“ Jun 5
Direct Sow May 15 May 15 โ€“ Jun 5
Fall Sowing June 18 Jun 18 โ€“ Jul 2
Harvest June 26 Jun 26 โ€“ Jul 31
โ–ธ Zone 3a ~123 day growing season ยท Full guide โ†’

Last frost: May 15 ยท First frost: September 15 ยท 123 day season

Activity When Date Range
Start Indoors April 3 Apr 3 โ€“ Apr 17
Transplant Outdoors May 15 May 15 โ€“ May 29
Direct Sow May 8 May 8 โ€“ May 29
Fall Sowing June 23 Jun 23 โ€“ Jul 7
Harvest June 19 Jun 19 โ€“ Jul 24

Growing Tips for Northwest Territories

Direct sow in spring or fall. One of the most forgiving Asian greens for all seasons. Harvest outer leaves or cut whole plants. Excellent for stir-fries, soups, or salads.

Frequently Asked Questions

When should I plant Komatsuna in Northwest Territories?

Planting dates for Komatsuna in Northwest Territories depend on your USDA zone. Northwest Territories spans zones 2b, 3a. Check the planting calendar above for your specific zone's frost dates and planting windows.

What zone is Northwest Territories for planting?

Northwest Territories contains USDA hardiness zones 2b, 3a. Your specific zone depends on your location within the state โ€” northern and higher-elevation areas are in colder zones, while southern and coastal areas are warmer.

Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals, University Cooperative Extension planting guides. Last updated: April 2026.