When to plant Celery in Nez Perce County, ID
For Celery in Nez Perce County, the safe spring window opens around April 28 and closes around May 19. Last expected frost is May 12, first fall frost September 26, giving a 137-day growing season. A second sowing from July 18 to August 1 extends the harvest into fall.
When to Plant Celery in Nez Perce County, ID
Your August game plan for Nez Perce County, Idaho
Here's what deserves your attention in Nez Perce County, Idaho this month. Everything below is tailored to Zone 7b and timed around your local frost dates.
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Basket week: celery
Morning harvests are best — cooler temperatures mean crisper produce and longer fridge life.
Coming up in September — start thinking about
- First harvests: celery
Celery is a marshland plant that requires consistent moisture and cool temperatures to produce crisp, flavorful stalks. It is a rewarding but demanding garden crop.
Nez Perce County, Idaho is in USDA Zone 7b. The average last spring frost is May 12 and the first fall frost is September 26, giving you a growing season of approximately 137 days.
At an elevation of 4,819 feet, Nez Perce County receives approximately 16.7 inches of rainfall annually with predominantly loam soil. Summer highs average 90°F, providing good warmth for Celery during the growing season. With low rainfall, drip irrigation is essential for growing Celery successfully. Mulch heavily to conserve soil moisture.
Nez Perce County Soil Profile
Soil Type
Loam
Soil pH
6.6-8
Drainage
Well Drained
Celery 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 Nez Perce County
How your county's soil matches Celery's growing requirements.
Soil pH
Your soil pH (6.6–8.0) is more alkaline than Celery prefers (6.0–7.0). Add sulfur or peat moss to lower pH.
Soil Texture
The loam soil in Nez Perce County is excellent for Celery — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is moderate (2.6%). Annual compost additions will help Celery.
How to Plant Celery
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Celery Water Budget
Water stress score is 8/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Celery
Celery needs approximately 1.3 inches of water per week (5.6" per month). Here's how your county's rainfall compares month by month.
| Month | Celery Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.2" | 0" | ❄️ Dormant |
| Feb | — | 1" | 0" | ❄️ Dormant |
| Mar | — | 1.5" | 0" | ❄️ Dormant |
| Apr | — | 1.7" | 0" | ❄️ Dormant |
| May | 5.6" | 1.8" | 3.8" | 🚿 Regular watering |
| Jun | 5.6" | 1.2" | 4.4" | 🚿 Regular watering |
| Jul | 5.6" | 1.5" | 4.1" | 🚿 Regular watering |
| Aug | 5.6" | 1.7" | 3.9" | 🚿 Regular watering |
| Sep | 5.6" | 1.2" | 4.4" | 🚿 Regular watering |
| Oct | — | 1.7" | 0" | ❄️ Dormant |
| Nov | — | 1.1" | 0" | ❄️ Dormant |
| Dec | — | 1.1" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Sep in Nez Perce County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Celery 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.
Celery Planting Timeline — Nez Perce County, ID
Celery Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | April 7 | Apr 7 – Apr 21 |
| Transplant Outdoors | May 12 | May 12 – May 26 |
| Direct Sow | April 28 | Apr 28 – May 19 |
| Harvest | August 4 | Aug 4 – Sep 29 |
| Fall Sowing | July 18 | Jul 18 – Aug 1 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Start Indoors Direct Sow |
| May | Transplant Outdoors Direct Sow |
| June | — |
| July | Fall Sowing |
| August | Fall Sowing Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1.3"/week · 2-3 times/week
📅 Days to Maturity
80–120 days
🧪 Soil pH
Needs 6–7 · Your soil: too_alkaline
🗺️ USDA Zone
Zone 7b
📆 Growing Season
137 days in Nez Perce County
Growing Tips for Celery in Nez Perce County
Direct sow Celery outdoors after May 12 in Nez Perce County when soil has warmed and frost danger has passed.
Common pests for Celery in this region include carrot rust fly and parsleyworm. Use row covers early in the season and inspect plants weekly.
Nez Perce County receives only 17" of rain annually. Celery needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.
General growing tips
Start seeds indoors 10-12 weeks before last frost. Keep soil consistently moist and never let it dry out. Blanch stalks by mounding soil or using collars for milder flavor.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Celery in Other Locations
Frequently Asked Questions
When should I plant Celery in Nez Perce County, ID?
Nez Perce County is in Zone 7b with an average last frost of May 12. Plan your Celery planting based on this frost date — see the calendar above for exact timing.
What planting zone is Nez Perce County, ID?
Nez Perce County, Idaho is in USDA Hardiness Zone 7b. The average last spring frost is May 12 and first fall frost is September 26.
When should I plant Celery in Nez Perce County, ID?
In Nez Perce County, ID, plant Celery after the last frost (around May 12) and before the first frost (around September 26). Best results when soil holds above 50°F.
What growing zone is Nez Perce County, ID for Celery?
Nez Perce County sits in USDA Zone 7b. Celery grows reliably in zones 2a through 10b, so it's a good fit here.
Can Celery grow in Nez Perce County's climate?
Yes — Celery grows well in Nez Perce County's temperate climate. Nez Perce County averages a 137-day frost-free season, with last frost around May 12 and first frost around September 26.
Your Nez Perce County Garden Planner — Free
A 22-page printable planner built for Nez Perce 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.