When to Plant Corn in Pueblo County, CO
Corn is a warm-season grass grown for its sweet ears, which are best eaten soon after harvest. It is wind-pollinated and must be planted in blocks for good kernel fill.
Pueblo County, Colorado is in USDA Zone 6a. The average last spring frost is May 7 and the first fall frost is October 7, giving you a growing season of approximately 153 days.
At an elevation of 4,607 feet, Pueblo County receives approximately 14.1 inches of rainfall annually with predominantly loam soil. Summer highs average 88°F, providing good warmth for Corn during the growing season. With low rainfall, drip irrigation is essential for growing Corn successfully. Mulch heavily to conserve soil moisture.
Pueblo County Soil Profile
Soil Type
Loam
Soil pH
6.7-7.9
Drainage
Well Drained
Plant Planting Risk Windows
Percentages indicate frost risk at transplant. The 70% safe window means there is a 30% chance of frost after transplant — suitable for cold-hardy crops or gardeners with frost protection. The 90% safe window is best for tender plants.
Plant Water Budget
Water stress score is 8/10 — consider drought-tolerant varieties and mulching
Corn Planting Timeline — Pueblo County, CO
Corn Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | May 14 | May 14 – Jun 4 |
| Harvest | July 16 | Jul 16 – Sep 10 |
Plant 1" deep · 12" apart · Rows 36" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Direct Sow |
| June | Direct Sow |
| July | Harvest |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
Sun
Full Sun (6-8+ hours)
Water
Moderate — regular watering
Days to Maturity
60–100 days
Soil pH
6 – 7
USDA Zone
Zone 6a
Growing Season
153 days
Growing Tips for Pueblo County
Plant in blocks of at least 4 rows rather than single rows for proper pollination. Direct sow after soil reaches 60F. Side-dress with nitrogen when plants are knee-high.
Companion Planting
Good Companions
Avoid Planting Near
Level Up Your Garden
Corn in Other Locations
Frequently Asked Questions
When should I plant Corn in Pueblo County, CO?
Pueblo County is in Zone 6a with an average last frost of May 7. Plan your Corn planting based on this frost date — see the calendar above for exact timing.
What planting zone is Pueblo County, CO?
Pueblo County, Colorado is in USDA Hardiness Zone 6a. The average last spring frost is May 7 and first fall frost is October 7.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Pueblo County gardeners in Zone 6a organize planting dates, track what's growing, and never miss a planting window.
Get Your Free Garden Planner →Free download. Plan your entire garden season in minutes.