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🌽 Growing Corn in Zone 3a
Zone 3a has harsh winters and a short growing season. Start Corn early indoors to maximize your harvest window. Last frost: May 22. First frost: Sep 12.
Planting Calendar
Season: May 22 – Sep 12 (113 days) · Succession: plant every 2 weeks (up to 2x)
When to Plant Corn in Zone 3a
Sow Seeds Outdoors: May 29
Direct sow Corn seeds outdoors around May 29. Soil temperature should be at least 60°F. Space at 4/sqft (6" apart).
Harvest: Aug 22
First harvest approximately Aug 22 (~85 days from planting). Continue harvesting until first frost (Sep 12).
Companion Planting
Corn 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 Corn in Zone 3a?
Direct sow Corn outdoors around May 29. Harvest around Aug 22.
What is the last frost date for Zone 3a?
The average last spring frost date for Zone 3a is May 22. The first fall frost averages Sep 12, giving a 113-day growing season.
Can I grow Corn in Zone 3a?
Yes. Corn needs 85 days to harvest. Zone 3a has a 113-day growing season, which is sufficient. You can plant up to 2 successions.
What is the best month to plant Corn in Zone 3a?
The best time to plant Corn in Zone 3a is around May 29, when soil temperatures are suitable and frost risk has passed.
What companion plants grow well with Corn?
Good companion plants for Corn include Beans, Squash, Cucumbers, Peas, Pumpkins. Avoid planting Corn near Tomatoes.
How long does Corn take to harvest?
Corn takes approximately 85 days from planting to harvest. In Zone 3a, expect your first harvest around Aug 22.
Plan Your Corn Garden
Track Corn from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.
Start Free Corn Growing Guide