When should I plant Kopar in Zone 4a?

Direct sow Kopar outdoors around Apr 21. Expect first harvest around May 31.

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. Kopar needs 40 days to harvest. Zone 4a has a 149-day growing season, which is sufficient. You can plant up to 5 successions.

Zone 4a has cold winters and a moderate growing season. Timing is key for Kopar in this zone. Zadnji mraz: May 5. Prvi mraz: Oct 1.

Outdoor

Harvest

Apr 21Oct 1

Season: May 5 – Oct 1 (149 dana) · Succession: plant every 3 weeks (up to 5x)

Zona4a

Zadnji mrazMay 5

Prvi mrazOct 1

Sezona149 dana

Berba40 dana

SuncePuno Sunce

Direct sow Kopar seeds outdoors around Apr 21. Wait until soil temperature reaches 50F. Space plants at 4/m² (15cm razmak).

First harvest approximately May 31 (~40 dana from planting). Continue harvesting until first frost (Oct 1).

For a fall harvest, plant Kopar around Aug 20 (6 weeks before first frost).

❌ Mrkve

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