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When to Plant Echinacea in Herkimer County, NY

Echinacea (purple coneflower) is a native prairie perennial valued for its immune-supporting properties and beautiful daisy-like flowers that attract pollinators.

Herkimer County, New York is in USDA Zone 4b. The average last spring frost is May 15 and the first fall frost is September 30, giving you a growing season of approximately 138 days.

At an elevation of 160 feet, Herkimer County receives approximately 48.9 inches of rainfall annually with predominantly silt loam soil. Summer highs average 82ยฐF, so choose short-season varieties of Echinacea to ensure they mature before fall.

Herkimer County, NY (Zone 4b) Short season
138 days
Last Spring Frost May 15
138 growing days
First Fall Frost September 30

Herkimer County Soil Profile

Soil Type

Silt Loam

Soil pH

5.1-6.4

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✗ May not fit
Transplant: May 18 🍅 Harvest: Sep 21 – Oct 12
Recommended (50%) ✗ May not fit
Transplant: May 22 🍅 Harvest: Sep 25 – Oct 16
Safe Start (90%) ✗ May not fit
Transplant: Jun 7 🍅 Harvest: Oct 11 – Nov 1

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

Plant needs
0.5″/week
Rainfall provides
1.5″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Echinacea needs ~1,725 GDD — county provides 1,587 GDD Tight fit

Echinacea Planting Timeline โ€” Herkimer County, NY

Echinacea Planting Calendar

Activity When Date Range
Transplant Outdoors May 22 May 22 โ€“ Jun 5
Harvest September 25 Sep 25 โ€“ Oct 16

Plant 0.5" deep ยท 8" apart ยท Rows 12" apart

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April โ€”
May Transplant Outdoors
June Transplant Outdoors
July โ€”
August โ€”
September Harvest
October Harvest
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Low โ€” drought tolerant

Days to Maturity

120โ€“180 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 4b

Growing Season

138 days

Growing Tips for Herkimer County

Start seeds indoors 8-10 weeks before last frost or direct sow in fall for spring germination. Seeds need cold stratification. Deadhead to prolong blooming or leave seed heads for birds.

Companion Planting

Good Companions

Level Up Your Garden

Frequently Asked Questions

When should I plant Echinacea in Herkimer County, NY?

Herkimer County is in Zone 4b with an average last frost of May 15. Plan your Echinacea planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Herkimer County, NY?

Herkimer County, New York is in USDA Hardiness Zone 4b. The average last spring frost is May 15 and first fall frost is September 30.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Herkimer County gardeners in Zone 4b organize planting dates, track what's growing, and never miss a planting window.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Herkimer County, NY. Local conditions may vary. Last updated: April 2026.