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🌽 Growing Corn in Zone 4a
Zone 4a has cold winters and a moderate growing season. Timing is key for Corn in this zone. Last frost: May 5. First frost: Oct 1.
Planting Calendar
Season: May 5 – Oct 1 (149 days) · Succession: plant every 2 weeks (up to 4x)
When to Plant Corn in Zone 4a
Sow Seeds Outdoors: May 12
Direct sow Corn seeds outdoors around May 12. Soil temperature should be at least 60°F. Space at 4/sqft (6" apart).
Harvest: Aug 5
First harvest approximately Aug 5 (~85 days from planting). Continue harvesting until first frost (Oct 1).
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 4a?
Direct sow Corn outdoors around May 12. Harvest around Aug 5.
What is the last frost date for Zone 4a?
The average last spring frost date for Zone 4a is May 5. The first fall frost averages Oct 1, giving a 149-day growing season.
Can I grow Corn in Zone 4a?
Yes. Corn needs 85 days to harvest. Zone 4a has a 149-day growing season, which is sufficient. You can plant up to 4 successions.
What is the best month to plant Corn in Zone 4a?
The best time to plant Corn in Zone 4a is around May 12, 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 4a, expect your first harvest around Aug 5.
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