When to Plant Valerian in Clark County, NV
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.
Clark County, Nevada is in USDA Zone 9a. The average last spring frost is February 28 and the first fall frost is November 23, giving you a growing season of approximately 268 days.
At an elevation of 2,811 feet, Clark County receives approximately 9.3 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 111°F, so Valerian may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Valerian will need more frequent watering and organic matter to retain nutrients. With low rainfall, drip irrigation is essential for growing Valerian successfully. Mulch heavily to conserve soil moisture.
Clark County Soil Profile
Soil Type
Sandy Loam
Soil pH
7.3-8.4
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 Clark County
How your county's soil matches Valerian's growing requirements.
Soil pH
Your soil pH (7.3–8.4) is more alkaline than Valerian prefers (5.5–7.0). Add sulfur or peat moss to lower pH.
Soil Texture
Sandy soil in Clark County warms quickly in spring but drains fast. Valerian will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Drainage is adequate for Valerian.
Organic Matter
Organic matter is low (0.8%). Add 2-3 inches of compost before planting Valerian.
How to Plant Valerian
Plant Water Budget
Water stress score is 10/10 — consider drought-tolerant varieties and mulching
Valerian Planting Timeline — Clark County, NV
Valerian Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Transplant Outdoors | March 7 | Mar 7 – Mar 21 |
| Harvest | July 11 | Jul 11 – Oct 17 |
Plant 0.5" deep · 8" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Transplant Outdoors |
| April | — |
| May | — |
| June | — |
| July | Harvest |
| August | Harvest |
| September | Harvest |
| October | Harvest |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
1"/week · 2-3 times/week
📅 Days to Maturity
120–180 days
🧪 Soil pH
Needs 5.5–7 · Your soil: too_alkaline
🗺️ USDA Zone
Zone 9a
📆 Growing Season
268 days in Clark County
Growing Tips for Valerian in Clark County
Direct sow Valerian outdoors after February 28 in Clark County when soil has warmed and frost danger has passed.
Sandy soil in Clark County dries quickly — mulch Valerian with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
With summer highs reaching 111°F in Clark County, provide afternoon shade for Valerian and water deeply in the morning.
Clark County receives only 9" of rain annually. Valerian needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.
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
Level Up Your Garden
Valerian in Other Locations
Frequently Asked Questions
When should I plant Valerian in Clark County, NV?
Clark County is in Zone 9a with an average last frost of February 28. Plan your Valerian planting based on this frost date — see the calendar above for exact timing.
What planting zone is Clark County, NV?
Clark County, Nevada is in USDA Hardiness Zone 9a. The average last spring frost is February 28 and first fall frost is November 23.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Clark County gardeners in Zone 9a organize planting dates, track what's growing, and never miss a planting window.
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