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When to Plant Chamomile in Armstrong County, PA

Chamomile is a daisy-like herb famous for its calming, apple-scented tea. German chamomile is an annual while Roman chamomile is a perennial ground cover.

Armstrong County, Pennsylvania is in USDA Zone 5b. The average last spring frost is April 29 and the first fall frost is October 18, giving you a growing season of approximately 172 days.

At an elevation of 213 feet, Armstrong County receives approximately 49.9 inches of rainfall annually with predominantly silt loam soil. Summer highs average 86ยฐF, providing good warmth for Chamomile during the growing season.

Armstrong County, PA (Zone 5b) Moderate season
172 days
Last Spring Frost April 29
172 growing days
First Fall Frost October 18

Armstrong County Soil Profile

Soil Type

Silt Loam

Soil pH

5-6.3

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (46 days to spare)
Start indoors: Mar 21 Transplant: Apr 18 🍅 Harvest: Jun 20 – Aug 29
Recommended (50%) ✓ Fits season (46 days to spare)
Start indoors: Mar 25 Transplant: Apr 22 🍅 Harvest: Jun 24 – Sep 2
Safe Start (90%) ✓ Fits season (40 days to spare)
Start indoors: Apr 15 Transplant: May 13 🍅 Harvest: Jul 15 – Sep 23

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
Chamomile needs ~1,088 GDD — county provides 2,494 GDD Excellent fit

Chamomile Planting Timeline โ€” Armstrong County, PA

Chamomile Planting Calendar

Activity When Date Range
Start Indoors March 25 Mar 25 โ€“ Apr 8
Transplant Outdoors April 22 Apr 22 โ€“ May 6
Direct Sow April 15 Apr 15 โ€“ May 6
Fall Sowing August 9 Aug 9 โ€“ Aug 23
Harvest June 24 Jun 24 โ€“ Sep 2

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

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

60โ€“90 days

Soil pH

5.6 โ€“ 7.5

USDA Zone

Zone 5b

Growing Season

172 days

Growing Tips for Armstrong County

Direct sow on the soil surface as seeds need light. Harvest flowers when petals begin to curl back. Chamomile self-sows freely and improves the health of nearby plants.

Companion Planting

Good Companions

Level Up Your Garden

Frequently Asked Questions

When should I plant Chamomile in Armstrong County, PA?

Armstrong County is in Zone 5b with an average last frost of April 29. Plan your Chamomile planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Armstrong County, PA?

Armstrong County, Pennsylvania is in USDA Hardiness Zone 5b. The average last spring frost is April 29 and first fall frost is October 18.

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Plan Your Garden with Confidence

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