When should I plant Koriander in Zone 4b?

Direct sow Koriander outdoors around Apr 17. Expect first harvest around May 17.

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. Koriander needs 30 days to harvest. Zone 4b has a 157-day growing season, which is sufficient. You can plant up to 9 successions.

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Zone 4b has cold winters and a moderate growing season. Timing is key for Koriander in this zone. Viimane öökülm: May 1. Esimene öökülm: Oct 5.

Outdoor

Harvest

Apr 17Oct 5

Season: May 1 – Oct 5 (157 päeva) · Succession: plant every 2 weeks (up to 9x)

Tsoon4b

Viimane öökülmMay 1

Esimene öökülmOct 5

Hooaeg157 päeva

Saak30 päeva

PäikePoolvari

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

First harvest approximately May 17 (~30 päeva from planting). Continue harvesting until first frost (Oct 5).

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

✅ Tomatid✅ Paprikad✅ Oad✅ Herned✅ Spinat

❌ Apteegitill❌ Till

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

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