When to Plant Yarrow in Harding County, SD
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.
Harding County, South Dakota is in USDA Zone 3b. The average last spring frost is May 16 and the first fall frost is September 22, giving you a growing season of approximately 129 days.
At an elevation of 750 feet, Harding County receives approximately 29.3 inches of rainfall annually with predominantly loam soil. Summer highs average 78°F, so choose short-season varieties of Yarrow to ensure they mature before fall.
Harding County Soil Profile
Soil Type
Loam
Soil pH
6.3-7.7
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
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Yarrow Planting Timeline — Harding County, SD
Yarrow Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | May 23 | May 23 – Jun 6 |
| Harvest | August 22 | Aug 22 – Sep 26 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Transplant Outdoors |
| June | Transplant Outdoors |
| July | — |
| August | Harvest |
| September | Harvest |
| October | — |
| 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 3b
Growing Season
129 days
Growing Tips for Harding 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 Harding County, SD?
Harding County is in Zone 3b with an average last frost of May 16. Plan your Yarrow planting based on this frost date — see the calendar above for exact timing.
What planting zone is Harding County, SD?
Harding County, South Dakota is in USDA Hardiness Zone 3b. The average last spring frost is May 16 and first fall frost is September 22.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Harding County gardeners in Zone 3b organize planting dates, track what's growing, and never miss a planting window.
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