When to Plant Yarrow in Fairfield County, SC
What to do in April
If you only do a handful of things in the garden this April, make it these. They're sequenced around your zone's frost timing.
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Harden off and plant yarrow
Plant tomatoes deep — bury the stem up to the first true leaves to grow extra roots. Everything else goes in at the same depth it grew in the tray.
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.
Fairfield County, South Carolina is in USDA Zone 7b. The average last spring frost is March 27 and the first fall frost is November 6, giving you a growing season of approximately 224 days.
At an elevation of 346 feet, Fairfield County receives approximately 60 inches of rainfall annually with predominantly clay loam soil. Summer highs average 88°F, providing good warmth for Yarrow during the growing season. Clay soil retains moisture well for Yarrow, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Yarrow root diseases.
Fairfield County Soil Profile
Soil Type
Clay Loam
Soil pH
5.7-6.4
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.
Soil Compatibility in Fairfield County
How your county's soil matches Yarrow's growing requirements.
Soil pH
Your soil pH (5.7–6.4) is within Yarrow's preferred range (5.5–7.0).
Soil Texture
The clay loam soil in Fairfield County is excellent for Yarrow — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.4%). Annual compost additions will help Yarrow.
How to Plant Yarrow
Plant Water Budget
Monthly Watering Guide for Yarrow
Yarrow needs approximately 0.5 inches of water per week (2.2" per month). Here's how your county's rainfall compares month by month.
| Month | Yarrow Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 5.6" | 0" | ❄️ Dormant |
| Feb | — | 4.9" | 0" | ❄️ Dormant |
| Mar | 2.2" | 5.5" | 0" | ✅ Rainfall sufficient |
| Apr | 2.2" | 4" | 0" | ✅ Rainfall sufficient |
| May | 2.2" | 4.4" | 0" | ✅ Rainfall sufficient |
| Jun | 2.2" | 6.3" | 0" | ✅ Rainfall sufficient |
| Jul | 2.2" | 5.6" | 0" | ✅ Rainfall sufficient |
| Aug | 2.2" | 5.4" | 0" | ✅ Rainfall sufficient |
| Sep | 2.2" | 5.3" | 0" | ✅ Rainfall sufficient |
| Oct | 2.2" | 4.2" | 0" | ✅ Rainfall sufficient |
| Nov | 2.2" | 4.6" | 0" | ✅ Rainfall sufficient |
| Dec | — | 4.3" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Fairfield County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Yarrow Heat Requirements (GDD)
What are Growing Degree Days (GDD)?
Growing Degree Days measure the total warmth your plants receive during the growing season. Think of it as a "heat bank" — every day above 50°F deposits warmth that helps your plants grow.
Each plant needs a certain amount of accumulated heat to mature. If your county provides more GDD than the plant needs, it's a great fit. If it's close, you may want to choose faster-maturing varieties or start seeds indoors to get a head start.
Yarrow Planting Timeline — Fairfield County, SC
Yarrow Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | April 3 | Apr 3 – Apr 17 |
| Harvest | July 3 | Jul 3 – Sep 18 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Transplant Outdoors |
| May | — |
| June | — |
| July | Harvest |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.5"/week · Natural rainfall sufficient
📅 Days to Maturity
90–120 days
🧪 Soil pH
Needs 5.5–7 · Your soil: ideal
🗺️ USDA Zone
Zone 7b
📆 Growing Season
224 days in Fairfield County
Growing Tips for Yarrow in Fairfield County
Direct sow Yarrow outdoors after March 27 in Fairfield County when soil has warmed and frost danger has passed.
With Fairfield County's clay soil (30% clay), work in 3-4 inches of compost before planting Yarrow. Avoid tilling when soil is wet to prevent compaction.
Common pests for Yarrow in this region include aphids and slugs. Use row covers early in the season and inspect plants weekly.
General growing tips
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
Check more plant combinations with our Companion Planting Checker →
Yarrow in Other Locations
Frequently Asked Questions
When should I plant Yarrow in Fairfield County, SC?
Fairfield County is in Zone 7b with an average last frost of March 27. Plan your Yarrow planting based on this frost date — see the calendar above for exact timing.
What planting zone is Fairfield County, SC?
Fairfield County, South Carolina is in USDA Hardiness Zone 7b. The average last spring frost is March 27 and first fall frost is November 6.
Your Fairfield County Garden Planner — Free
A 24-page printable planner built for Fairfield County (Zone 7b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.