When should I plant Soybean in Zone 4b?

Direct sow Soybean outdoors around May 8. Harvest around Aug 26.

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. Soybean needs 110 days to harvest. Zone 4b has a 157-day growing season, which is sufficient.

Zone 4b has cold winters and a moderate growing season. Timing is key for Soybean in this zone. Last frost: May 1. First frost: Oct 5.

Outdoor

Harvest

May 8Oct 5

Season: May 1 – Oct 5 (157 days)

Zone4b

Last FrostMay 1

First FrostOct 5

Season Length157 days

Days to Harvest110

SunFull Sun

Frost ToleranceNone

Spacing4/sqft (6" apart)

Direct sow Soybean seeds outdoors around May 8. Soil temperature should be at least 60°F. Space at 4/sqft (6" apart).

First harvest approximately Aug 26 (~110 days from planting). Continue harvesting until first frost (Oct 5).

❌ Onion❌ Garlic

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