When to Plant Corn in Westmoreland County, PA
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.
Westmoreland County, Pennsylvania is in USDA Zone 6a. The average last spring frost is April 23 and the first fall frost is October 27, giving you a growing season of approximately 187 days.
At an elevation of 894 feet, Westmoreland County receives approximately 38.6 inches of rainfall annually with predominantly silt loam soil. Summer highs average 91°F, providing good warmth for Corn during the growing season.
Westmoreland County Soil Profile
Soil Type
Silt Loam
Soil pH
4.8-6.2
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
Corn Planting Timeline — Westmoreland County, PA
Corn Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | April 30 | Apr 30 – May 21 |
| Harvest | July 2 | Jul 2 – Aug 27 |
Plant 1" deep · 12" apart · Rows 36" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Direct Sow |
| May | Direct Sow |
| June | — |
| July | Harvest |
| August | Harvest |
| September | — |
| 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
187 days
Growing Tips for Westmoreland 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 Westmoreland County, PA?
Westmoreland County is in Zone 6a with an average last frost of April 23. Plan your Corn planting based on this frost date — see the calendar above for exact timing.
What planting zone is Westmoreland County, PA?
Westmoreland County, Pennsylvania is in USDA Hardiness Zone 6a. The average last spring frost is April 23 and first fall frost is October 27.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Westmoreland County gardeners in Zone 6a organize planting dates, track what's growing, and never miss a planting window.
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