When should I plant Koper in Zone 4b?

Direct sow Koper outdoors around Apr 17. Expect first harvest around May 27.

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. Koper needs 40 days to harvest. Zone 4b has a 157-day growing season, which is sufficient. You can plant up to 5 successions.

Zone 4b has cold winters and a moderate growing season. Timing is key for Koper in this zone. Zadnja slana: May 1. Prva slana: Oct 5.

Outdoor

Harvest

Apr 17Oct 5

Season: May 1 – Oct 5 (157 dni) · Succession: plant every 3 weeks (up to 5x)

Cona4b

Zadnja slanaMay 1

Prva slanaOct 5

Sezona157 dni

Žetev40 dni

SoncePolno Sonce

Direct sow Koper seeds outdoors around Apr 17. Wait until soil temperature reaches 50F. Space plants at 4/m² (15cm narazen).

First harvest approximately May 27 (~40 dni from planting). Continue harvesting until first frost (Oct 5).

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

❌ Korenje

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