When to Plant Celery in North Slope Borough, AK
May in the garden — North Slope Borough, Alaska
Your North Slope Borough, Alaska garden is entering a new phase. Here's what's on the schedule for May and why each task matters now.
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.
North Slope Borough, Alaska is in USDA Zone 2b. The average last spring frost is May 27 and the first fall frost is July 31, giving you a growing season of approximately 65 days.
At an elevation of 2,600 feet, North Slope Borough receives approximately 16.6 inches of rainfall annually with predominantly silt loam soil. Summer highs average 69°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.
North Slope Borough Soil Profile
Soil Type
Silt Loam
Soil pH
4.9-6.7
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 North Slope Borough
How your county's soil matches Celery's growing requirements.
Soil pH
Your soil pH (4.9–6.7) is more acidic than Celery prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
The silt loam soil in North Slope Borough is excellent for Celery — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Celery.
Organic Matter
Organic matter is excellent (5.7%) — Celery will thrive.
How to Plant Celery
Fall planting: Sow 12 weeks before your first frost date for a fall harvest.
Plant Water Budget
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 | — | 0.7" | 0" | ❄️ Dormant |
| Feb | — | 0.6" | 0" | ❄️ Dormant |
| Mar | — | 0.6" | 0" | ❄️ Dormant |
| Apr | — | 0.5" | 0" | ❄️ Dormant |
| May | 5.6" | 0.7" | 4.9" | 🚿 Regular watering |
| Jun | 5.6" | 1.2" | 4.4" | 🚿 Regular watering |
| Jul | 5.6" | 2.2" | 3.4" | 🚿 Regular watering |
| Aug | — | 2.4" | 0" | ❄️ Dormant |
| Sep | — | 3.1" | 0" | ❄️ Dormant |
| Oct | — | 2.2" | 0" | ❄️ Dormant |
| Nov | — | 1.3" | 0" | ❄️ Dormant |
| Dec | — | 1" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Jul in North Slope Borough). 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 — North Slope Borough, AK
Celery Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | April 15 | Apr 15 – Apr 29 |
| Transplant Outdoors | May 27 | May 27 – Jun 10 |
| Direct Sow | May 20 | May 20 – Jun 10 |
| Harvest | August 19 | Aug 19 – Oct 14 |
| Fall Sowing | May 8 | May 8 – May 22 |
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 Fall Sowing |
| June | Transplant Outdoors Direct Sow |
| July | — |
| August | Harvest |
| September | Harvest |
| October | Harvest |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1.3"/week · Natural rainfall sufficient
📅 Days to Maturity
80–120 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 2b
📆 Growing Season
65 days in North Slope Borough
Growing Tips for Celery in North Slope Borough
Your 65.0-day growing season in North Slope Borough 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.
North Slope Borough 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 North Slope Borough, AK?
North Slope Borough is in Zone 2b with an average last frost of May 27. Plan your Celery planting based on this frost date — see the calendar above for exact timing.
What planting zone is North Slope Borough, AK?
North Slope Borough, Alaska is in USDA Hardiness Zone 2b. The average last spring frost is May 27 and first fall frost is July 31.
Your North Slope Borough Garden Planner — Free
A 24-page printable planner built for North Slope Borough (Zone 2b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.