When should I plant Cilantro in Zone 3b?

Direct sow Cilantro outdoors around May 1. Harvest around May 31.

What is the last frost date for Zone 3b?

The average last spring frost date for Zone 3b is May 15. The first fall frost averages Sep 22, giving a 130-day growing season.

Can I grow Cilantro in Zone 3b?

Yes. Cilantro needs 30 days to harvest. Zone 3b has a 130-day growing season, which is sufficient. You can plant up to 7 successions.

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🌿 Growing Cilantro in Zone 3b

Zone 3b has harsh winters and a short growing season. Start Cilantro early indoors to maximize your harvest window. Last frost: May 15. First frost: Sep 22.

Planting Calendar

Outdoor

Harvest

May 1Sep 22

Season: May 15 – Sep 22 (130 days) · Succession: plant every 2 weeks (up to 7x)

Zone3b

Last FrostMay 15

First FrostSep 22

Season Length130 days

Days to Harvest30

SunPart Sun / Part Shade

Frost ToleranceLight

Spacing4/sqft (6" apart)

When to Plant Cilantro in Zone 3b

Sow Seeds Outdoors: May 1

Direct sow Cilantro seeds outdoors around May 1. Soil temperature should be at least 50°F. Space at 4/sqft (6" apart).

Harvest: May 31

First harvest approximately May 31 (~30 days from planting). Continue harvesting until first frost (Sep 22).

Fall Planting: Aug 11

For a fall harvest, plant Cilantro around Aug 11 (6 weeks before first frost).

Companion Planting

✅ Tomatoes✅ Peppers✅ Beans✅ Peas✅ Spinach

❌ Fennel❌ Dill

Cilantro in Other Zones

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

Plan Your Cilantro Garden

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

Start Free Cilantro Growing Guide