When should I plant Sennep in Zone 3b?

Direct sow Sennep outdoors around Apr 17. Expect first harvest around Jun 1.

What is the last frost date for Zone 3b?

The average last spring frost date for Zone 3b is May 15. The first fall frost averages Sep 22, giving a 130-day growing season.

Can I grow Sennep in Zone 3b?

Yes. Sennep needs 45 days to harvest. Zone 3b has a 130-day growing season, which is sufficient. You can plant up to 6 successions.

Growing Sennep in Zone 3b

Zone 3b has harsh winters and a short growing season. Start Sennep early indoors to maximize your harvest window. Sidste frost: May 15. Første frost: Sep 22.

Planting Calendar

Outdoor

Harvest

Apr 17Sep 22

Season: May 15 – Sep 22 (130 dage) · Succession: plant every 2 weeks (up to 6x)

Zone3b

Sidste frostMay 15

Første frostSep 22

Sæson130 dage

Høst45 dage

SolHalvskygge

When to Plant Sennep in Zone 3b

Sow Seeds Outdoors: Apr 17

Direct sow Sennep seeds outdoors around Apr 17. Wait until soil temperature reaches 40F. Space plants at 4/m² (15cm afstand).

Harvest: Jun 1

First harvest approximately Jun 1 (~45 dage from planting). Continue harvesting until first frost (Sep 22).

Fall Planting: Aug 11

For a fall harvest, plant Sennep around Aug 11 (6 weeks before first frost).

Sennep in Other Zones

1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

Plan Your Garden Sennep

Track Sennep from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.

Start Free Sennep Growing Guide