When to Plant Yarrow in Ashtabula County, OH
Yarrow is a drought-tolerant perennial herb with feathery foliage and flat-topped flower clusters in white, yellow, pink, or red. It attracts beneficial insects and is used in herbal medicine.
Ashtabula County, Ohio is in USDA Zone 5b. The average last spring frost is April 29 and the first fall frost is October 22, giving you a growing season of approximately 176 days.
At an elevation of 963 feet, Ashtabula County receives approximately 32.2 inches of rainfall annually with predominantly silt loam soil. Summer highs average 84°F, so choose short-season varieties of Yarrow to ensure they mature before fall.
Ashtabula County Soil Profile
Soil Type
Silt Loam
Soil pH
5.8-6.8
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
Yarrow Planting Timeline — Ashtabula County, OH
Yarrow Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | May 6 | May 6 – May 20 |
| Harvest | August 5 | Aug 5 – Oct 21 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Transplant Outdoors |
| June | — |
| July | — |
| August | Harvest |
| September | Harvest |
| October | Harvest |
| November | — |
| December | — |
Growing Conditions
Sun
Full Sun (6-8+ hours)
Water
Low — drought tolerant
Days to Maturity
90–120 days
Soil pH
5.5 – 7
USDA Zone
Zone 5b
Growing Season
176 days
Growing Tips for Ashtabula County
Direct sow or start from divisions. Yarrow thrives in poor soil and is very drought-tolerant. Deadhead to encourage reblooming. Divide clumps every 3 years.
Companion Planting
Good Companions
Level Up Your Garden
Yarrow in Other Locations
Frequently Asked Questions
When should I plant Yarrow in Ashtabula County, OH?
Ashtabula County is in Zone 5b with an average last frost of April 29. Plan your Yarrow planting based on this frost date — see the calendar above for exact timing.
What planting zone is Ashtabula County, OH?
Ashtabula County, Ohio is in USDA Hardiness Zone 5b. The average last spring frost is April 29 and first fall frost is October 22.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Ashtabula County gardeners in Zone 5b organize planting dates, track what's growing, and never miss a planting window.
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