When should I plant Sennep in Zone 4a?

Direct sow Sennep outdoors around Apr 7. Expect first harvest around May 22.

What is the last frost date for Zone 4a?

The average last spring frost date for Zone 4a is May 5. The first fall frost averages Oct 1, giving a 149-day growing season.

Yes. Sennep needs 45 days to harvest. Zone 4a has a 149-day growing season, which is sufficient. You can plant up to 7 successions.

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

Outdoor

Harvest

Apr 7Oct 1

Season: May 5 – Oct 1 (149 dage) · Succession: plant every 2 weeks (up to 7x)

Zone4a

Sidste frostMay 5

Første frostOct 1

Sæson149 dage

Høst45 dage

SolHalvskygge

Direct sow Sennep seeds outdoors around Apr 7. Wait until soil temperature reaches 40F. Space plants at 4/m² (15cm afstand).

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

For a fall harvest, plant Sennep around Aug 20 (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.