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When to Plant Dill in Warren County, PA

Dill is a feathery annual herb with aromatic leaves and seeds. Its fine foliage and umbrella-shaped flower heads attract beneficial insects to the garden.

Warren County, Pennsylvania is in USDA Zone 5a. The average last spring frost is May 13 and the first fall frost is October 13, giving you a growing season of approximately 153 days.

At an elevation of 1,158 feet, Warren County receives approximately 43.3 inches of rainfall annually with predominantly silt loam soil. Summer highs average 84ยฐF, so choose short-season varieties of Dill to ensure they mature before fall.

Warren County, PA (Zone 5a) Moderate season
153 days
Last Spring Frost May 13
153 growing days
First Fall Frost October 13

Warren County Soil Profile

Soil Type

Silt Loam

Soil pH

5.1-6.2

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (57 days to spare)
Start indoors: Mar 31 Transplant: Apr 28 🍅 Harvest: Jun 9 – Aug 11
Recommended (50%) ✓ Fits season (55 days to spare)
Start indoors: Apr 8 Transplant: May 6 🍅 Harvest: Jun 17 – Aug 19
Safe Start (90%) ✓ Fits season (50 days to spare)
Start indoors: Apr 27 Transplant: May 25 🍅 Harvest: Jul 6 – Sep 7

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
1.0″/week
Rainfall provides
1.2″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Dill needs ~650 GDD — county provides 1,989 GDD Excellent fit

Dill Planting Timeline โ€” Warren County, PA

Dill Planting Calendar

Activity When Date Range
Start Indoors April 8 Apr 8 โ€“ Apr 22
Transplant Outdoors May 6 May 6 โ€“ May 20
Direct Sow April 29 Apr 29 โ€“ May 20
Fall Sowing August 4 Aug 4 โ€“ Aug 18
Harvest June 17 Jun 17 โ€“ Aug 19

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

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March โ€”
April Start Indoors Direct Sow
May Transplant Outdoors Direct Sow
June Harvest
July Harvest
August Fall Sowing Harvest
September โ€”
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

40โ€“60 days

Soil pH

5.5 โ€“ 7

USDA Zone

Zone 5a

Growing Season

153 days

Growing Tips for Warren County

Direct sow in spring as dill has a taproot and dislikes transplanting. Succession sow for continuous leaf harvest. Allow some plants to flower for seeds and to attract beneficial insects.

Companion Planting

Good Companions

Avoid Planting Near

  • Carrots
  • Tomatoes

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Frequently Asked Questions

When should I plant Dill in Warren County, PA?

Warren County is in Zone 5a with an average last frost of May 13. Plan your Dill planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Warren County, PA?

Warren County, Pennsylvania is in USDA Hardiness Zone 5a. The average last spring frost is May 13 and first fall frost is October 13.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Warren County gardeners in Zone 5a 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 Warren County, PA. Local conditions may vary. Last updated: April 2026.