When to Plant Valerian in Spartanburg County, SC
Your April planting checklist for Spartanburg County, South Carolina
April is a pivotal month for Spartanburg County, South Carolina gardens. Focus on these tasks first and you'll set up the rest of the season for success.
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Plant out valerian
Pick a cloudy afternoon or evening to plant. Less transplant shock, and your seedlings will barely blink.
Valerian is a tall perennial herb with fragrant white or pink flower clusters, valued for its root which is used as a natural sleep aid. It attracts pollinators and earthworms.
Spartanburg County, South Carolina is in USDA Zone 7b. The average last spring frost is April 7 and the first fall frost is November 1, giving you a growing season of approximately 208 days.
At an elevation of 275 feet, Spartanburg County receives approximately 52.3 inches of rainfall annually with predominantly clay loam soil. Summer highs average 92°F, providing good warmth for Valerian during the growing season. Clay soil retains moisture well for Valerian, but amend with compost to improve drainage and prevent root rot. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Valerian root diseases.
Spartanburg County Soil Profile
Soil Type
Clay Loam
Soil pH
5.2-6.8
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.
Soil Compatibility in Spartanburg County
How your county's soil matches Valerian's growing requirements.
Soil pH
Your soil pH (5.2–6.8) overlaps with Valerian's range (5.5–7.0), though not a perfect match.
Soil Texture
The clay loam soil in Spartanburg County is excellent for Valerian — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.8%). Annual compost additions will help Valerian.
How to Plant Valerian
Plant Water Budget
Monthly Watering Guide for Valerian
Valerian needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Valerian Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 4" | 0" | ❄️ Dormant |
| Feb | — | 4.9" | 0" | ❄️ Dormant |
| Mar | — | 4.9" | 0" | ❄️ Dormant |
| Apr | 4.3" | 4.1" | 0.2" | 💧 Light watering |
| May | 4.3" | 4" | 0.3" | 💧 Light watering |
| Jun | 4.3" | 4.6" | 0" | ✅ Rainfall sufficient |
| Jul | 4.3" | 5" | 0" | ✅ Rainfall sufficient |
| Aug | 4.3" | 5" | 0" | ✅ Rainfall sufficient |
| Sep | 4.3" | 4.7" | 0" | ✅ Rainfall sufficient |
| Oct | 4.3" | 3.3" | 1" | 💧 Light watering |
| Nov | 4.3" | 3.6" | 0.7" | 💧 Light watering |
| Dec | — | 4.1" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Nov in Spartanburg County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Valerian 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.
Valerian Planting Timeline — Spartanburg County, SC
Valerian Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | April 14 | Apr 14 – Apr 28 |
| Harvest | August 18 | Aug 18 – Nov 24 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Transplant Outdoors |
| May | — |
| June | — |
| July | — |
| August | Harvest |
| September | Harvest |
| October | Harvest |
| November | Harvest |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
1"/week · Natural rainfall sufficient
📅 Days to Maturity
120–180 days
🧪 Soil pH
Needs 5.5–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 7b
📆 Growing Season
208 days in Spartanburg County
Growing Tips for Valerian in Spartanburg County
Direct sow Valerian outdoors after April 07 in Spartanburg County when soil has warmed and frost danger has passed.
With Spartanburg County's clay soil (34% clay), work in 3-4 inches of compost before planting Valerian. Avoid tilling when soil is wet to prevent compaction.
General growing tips
Start seeds indoors and transplant after last frost. Harvest roots in fall of the second year. Deadhead flowers unless you want self-seeding. Cats are attracted to valerian root.
Companion Planting
Good Companions
Check more plant combinations with our Companion Planting Checker →
Valerian in Other Locations
Frequently Asked Questions
When should I plant Valerian in Spartanburg County, SC?
Spartanburg County is in Zone 7b with an average last frost of April 7. Plan your Valerian planting based on this frost date — see the calendar above for exact timing.
What planting zone is Spartanburg County, SC?
Spartanburg County, South Carolina is in USDA Hardiness Zone 7b. The average last spring frost is April 7 and first fall frost is November 1.
Your Spartanburg County Garden Planner — Free
A 24-page printable planner built for Spartanburg 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.