When should I plant Sennep in Zone 4b?

Direct sow Sennep outdoors around Apr 3. Expect first harvest around May 18.

What is the last frost date for Zone 4b?

The average last spring frost date for Zone 4b is May 1. The first fall frost averages Oct 5, giving a 157-day growing season.

Yes. Sennep needs 45 days to harvest. Zone 4b has a 157-day growing season, which is sufficient. You can plant up to 8 successions.

Zone 4b has cold winters and a moderate growing season. Timing is key for Sennep in this zone. Sidste frost: May 1. Første frost: Oct 5.

Outdoor

Harvest

Apr 3Oct 5

Season: May 1 – Oct 5 (157 dage) · Succession: plant every 2 weeks (up to 8x)

Zone4b

Sidste frostMay 1

Første frostOct 5

Sæson157 dage

Høst45 dage

SolHalvskygge

Direct sow Sennep seeds outdoors around Apr 3. Wait until soil temperature reaches 40F. Space plants at 4/m² (15cm afstand).

First harvest approximately May 18 (~45 dage from planting). Continue harvesting until first frost (Oct 5).

For a fall harvest, plant Sennep around Aug 24 (6 weeks before first frost).

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