When to Plant Elderberries in Union County, PA
Elderberries are fast-growing shrubs or small trees producing clusters of small, dark berries used for syrups, wines, and immune-boosting preparations. The flowers are also edible.
Union County, Pennsylvania is in USDA Zone 6a. The average last spring frost is April 27 and the first fall frost is October 22, giving you a growing season of approximately 178 days.
At an elevation of 250 feet, Union County receives approximately 39 inches of rainfall annually with predominantly silt loam soil. Summer highs average 85°F, providing good warmth for Elderberries during the growing season.
Union County Soil Profile
Soil Type
Silt Loam
Soil pH
5.1-6.2
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
Elderberries Planting Timeline — Union County, PA
Elderberries Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | May 18 | May 18 – Jun 1 |
· 120" apart · Rows 144" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Transplant Outdoors |
| June | Transplant Outdoors |
| July | — |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
Sun
Full Sun (6-8+ hours)
Water
Moderate — regular watering
Days to Maturity
730–1095 days
Soil pH
5.5 – 6.5
USDA Zone
Zone 6a
Growing Season
178 days
Growing Tips for Union County
Plant at least two varieties for cross-pollination. Prune annually to remove old canes and maintain shape. Berries must be cooked before eating as raw berries are mildly toxic.
Companion Planting
Good Companions
Level Up Your Garden
Elderberries in Other Locations
Frequently Asked Questions
When should I plant Elderberries in Union County, PA?
Union County is in Zone 6a with an average last frost of April 27. Plan your Elderberries planting based on this frost date — see the calendar above for exact timing.
What planting zone is Union County, PA?
Union County, Pennsylvania is in USDA Hardiness Zone 6a. The average last spring frost is April 27 and first fall frost is October 22.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Union County gardeners in Zone 6a organize planting dates, track what's growing, and never miss a planting window.
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