When should I plant Soybean in Zone 1b?

Direct sow Soybean outdoors around Jun 1. Harvest around Sep 19.

What is the last frost date for Zone 1b?

The average last spring frost date for Zone 1b is May 25. The first fall frost averages Aug 28, giving a 95-day growing season.

Can I grow Soybean in Zone 1b?

Zone 1b has a 95-day growing season, which may be too short for Soybean (110 days needed). Consider short-season varieties or season extension techniques.

Growing Soybean in Zone 1b

Zone 1b has harsh winters and a short growing season. Start Soybean early indoors to maximize your harvest window. Last frost: May 25. First frost: Aug 28.

Season Too Short

Soybean needs 110 days to harvest, but Zone 1b has only a 95-day growing season. Consider short-season varieties or season extension techniques (cold frames, row covers).

Zone1b

Last FrostMay 25

First FrostAug 28

Season Length95 days

Days to Harvest110

SunFull Sun

Frost ToleranceNone

Spacing4/sqft (6" apart)

When to Plant Soybean in Zone 1b

Sow Seeds Outdoors: Jun 1

Direct sow Soybean seeds outdoors around Jun 1. Soil temperature should be at least 60°F. Space at 4/sqft (6" apart).

Harvest: Sep 19

First harvest approximately Sep 19 (~110 days from planting). Continue harvesting until first frost (Aug 28).

Companion Planting

✅ Corn ✅ Squash ✅ Sesame

❌ Onion❌ Garlic

Soybean 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 Soybean Garden

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

Start Free Soybean Growing Guide