When should I plant Koriander in Zone 9b?

Direct sow Koriander outdoors around Feb 24. Expect first harvest around Mar 26.

What is the last frost date for Zone 9b?

The average last spring frost date for Zone 9b is Mar 10. The first fall frost averages Nov 15, giving a 250-day growing season.

Yes. Koriander needs 30 days to harvest. Zone 9b has a 250-day growing season, which is sufficient. You can plant up to 15 successions.

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Zone 9b has warm winters and an extended growing season -- excellent for heat-loving crops like Koriander. Sista frost: Mar 10. Första frost: Nov 15.

Outdoor

Harvest

Feb 24Nov 15

Season: Mar 10 – Nov 15 (250 dagar) · Succession: plant every 2 weeks (up to 15x)

Zon9b

Sista frostMar 10

Första frostNov 15

Säsong250 dagar

Skörd30 dagar

SolHalvskugga

Direct sow Koriander seeds outdoors around Feb 24. Wait until soil temperature reaches 50F. Space plants at 4/m² (15cm avstånd).

First harvest approximately Mar 26 (~30 dagar from planting). Continue harvesting until first frost (Nov 15).

For a fall harvest, plant Koriander around Oct 4 (6 weeks before first frost).

✅ Tomater✅ Paprikor✅ Bönor✅ Ärtor✅ Spenat

❌ Fänkål❌ Dill

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.