Growing Soybean in Zone 1a
Zone 1a 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 1a has only a 95-day growing season. Consider short-season varieties or season extension techniques (cold frames, row covers).
When to Plant Soybean in Zone 1a
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
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 13bFrequently Asked Questions
When should I plant Soybean in Zone 1a?
Direct sow Soybean outdoors around Jun 1. Harvest around Sep 19.
What is the last frost date for Zone 1a?
The average last spring frost date for Zone 1a is May 25. The first fall frost averages Aug 28, giving a 95-day growing season.
Can I grow Soybean in Zone 1a?
Zone 1a has a 95-day growing season, which may be too short for Soybean (110 days needed). Consider short-season varieties or season extension techniques.
What is the best month to plant Soybean in Zone 1a?
The best time to plant Soybean in Zone 1a is around Jun 1, when soil temperatures are suitable and frost risk has passed.
What companion plants grow well with Soybean?
Good companion plants for Soybean include Corn, Squash, Sesame. Avoid planting Soybean near Onion, Garlic.
How long does Soybean take to harvest?
Soybean takes approximately 110 days from planting to harvest. In Zone 1a, expect your first harvest around Sep 19.
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