When to plant Celery in Garfield County, MT
In Zone 4b (Garfield County), direct-sow Celery between May 9 and May 30 for spring, after the May 16 last-frost mark. A second sowing from June 29 to July 13 extends the harvest into fall.
When to Plant Celery in Garfield County, MT
What to do in June
Your Garfield County, Montana garden is entering a new phase. Here's what's on the schedule for June and why each task matters now.
-
Begin indoor sowing: celery
These need a head start before your last frost (May 16). Sow into cells now so you're ready to transplant in a few weeks.
-
Start your fall crops: celery
Fall crops get sweeter with a light frost. Don't be afraid of cool nights.
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.
Garfield County, Montana is in USDA Zone 4b. The average last spring frost is May 16 and the first fall frost is September 21, giving you a growing season of approximately 128 days.
At an elevation of 8,464 feet, Garfield County receives approximately 18.8 inches of rainfall annually with predominantly loam soil. Summer highs average 81°F, so choose short-season varieties of Celery to ensure they mature before fall. With low rainfall, drip irrigation is essential for growing Celery successfully. Mulch heavily to conserve soil moisture.
Garfield County Soil Profile
Soil Type
Loam
Soil pH
6.3-7.9
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 Garfield County
How your county's soil matches Celery's growing requirements.
Soil pH
Your soil pH (6.3–7.9) is more alkaline than Celery prefers (6.0–7.0). Add sulfur or peat moss to lower pH.
Soil Texture
The loam soil in Garfield County is excellent for Celery — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Celery is a heavy drinker but your soil drains very quickly. Mulch heavily and consider drip irrigation.
Organic Matter
Organic matter is moderate (2.5%). Annual compost additions will help Celery.
How to Plant Celery
Fall planting: Sow 12 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 | — | 1.2" | 0" | ❄️ Dormant |
| Mar | — | 1.7" | 0" | ❄️ Dormant |
| Apr | — | 1.7" | 0" | ❄️ Dormant |
| May | 5.6" | 2.3" | 3.3" | 🚿 Regular watering |
| Jun | 5.6" | 1.4" | 4.2" | 🚿 Regular watering |
| Jul | 5.6" | 1.5" | 4.1" | 🚿 Regular watering |
| Aug | 5.6" | 2" | 3.6" | 🚿 Regular watering |
| Sep | 5.6" | 1.8" | 3.8" | 🚿 Regular watering |
| Oct | — | 1.5" | 0" | ❄️ Dormant |
| Nov | — | 1.4" | 0" | ❄️ Dormant |
| Dec | — | 1.1" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Sep in Garfield 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 — Garfield County, MT
Celery Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | April 4 | Apr 4 – Apr 18 |
| Transplant Outdoors | May 16 | May 16 – May 30 |
| Direct Sow | May 9 | May 9 – May 30 |
| Harvest | August 8 | Aug 8 – Oct 3 |
| Fall Sowing | June 29 | Jun 29 – Jul 13 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Start Indoors |
| May | Transplant Outdoors Direct Sow |
| June | Fall Sowing |
| July | Fall Sowing |
| August | Harvest |
| September | Harvest |
| October | Harvest |
| 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 4b
📆 Growing Season
128 days in Garfield County
Growing Tips for Celery in Garfield County
Direct sow Celery outdoors after May 16 in Garfield County when soil has warmed and frost danger has passed.
Your 128.0-day growing season in Garfield County is tight for Celery (80.0-120.0 days to maturity). Start indoors and choose early-maturing varieties.
Common pests for Celery in this region include carrot rust fly and parsleyworm. Use row covers early in the season and inspect plants weekly.
Garfield County receives only 19" 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 Garfield County, MT?
Garfield County is in Zone 4b with an average last frost of May 16. Plan your Celery planting based on this frost date — see the calendar above for exact timing.
What planting zone is Garfield County, MT?
Garfield County, Montana is in USDA Hardiness Zone 4b. The average last spring frost is May 16 and first fall frost is September 21.
When should I plant Celery in Garfield County, MT?
In Garfield County, MT, plant Celery after the last frost (around May 16) and before the first frost (around September 21). Best results when soil holds above 50°F.
What growing zone is Garfield County, MT for Celery?
Garfield County sits in USDA Zone 4b. Celery grows reliably in zones 2a through 10b, so it's a good fit here.
Can Celery grow in Garfield County's climate?
Yes — Celery grows well in Garfield County's temperate climate. Garfield County averages a 128-day frost-free season, with last frost around May 16 and first frost around September 21.
Your Garfield County Garden Planner — Free
A 22-page printable planner built for Garfield County (Zone 4b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.