When to Plant Valerian in Greene County, AR
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.
Greene County, Arkansas is in USDA Zone 7a. The average last spring frost is March 27 and the first fall frost is November 2, giving you a growing season of approximately 220 days.
At an elevation of 441 feet, Greene County receives approximately 52.6 inches of rainfall annually with predominantly silt loam soil. Summer highs average 92°F, providing good warmth for Valerian during the growing season. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Valerian root diseases.
Greene County Soil Profile
Soil Type
Silt Loam
Soil pH
5.3-6.5
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
Valerian Planting Timeline — Greene County, AR
Valerian Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | April 3 | Apr 3 – Apr 17 |
| Harvest | August 7 | Aug 7 – Nov 13 |
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
Moderate — regular watering
Days to Maturity
120–180 days
Soil pH
5.5 – 7
USDA Zone
Zone 7a
Growing Season
220 days
Growing Tips for Greene County
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
Level Up Your Garden
Valerian in Other Locations
Frequently Asked Questions
When should I plant Valerian in Greene County, AR?
Greene County is in Zone 7a with an average last frost of March 27. Plan your Valerian planting based on this frost date — see the calendar above for exact timing.
What planting zone is Greene County, AR?
Greene County, Arkansas is in USDA Hardiness Zone 7a. The average last spring frost is March 27 and first fall frost is November 2.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Greene County gardeners in Zone 7a organize planting dates, track what's growing, and never miss a planting window.
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