When to Plant Fava Beans in Northwest Arctic Borough, AK
Top priorities for Northwest Arctic Borough, Alaska gardeners in May
May is a pivotal month for Northwest Arctic Borough, Alaska gardens. Focus on these tasks first and you'll set up the rest of the season for success.
Fava beans are a cool-season legume with large, meaty beans inside thick pods. They fix nitrogen in the soil and are one of the oldest cultivated crops.
Northwest Arctic Borough, Alaska is in USDA Zone 2a. The average last spring frost is May 18 and the first fall frost is August 6, giving you a growing season of approximately 80 days.
At an elevation of 2,144 feet, Northwest Arctic Borough receives approximately 42.6 inches of rainfall annually with predominantly silt loam soil. Summer highs average 56°F, so choose short-season varieties of Fava Beans to ensure they mature before fall.
Northwest Arctic Borough Soil Profile
Soil Type
Silt Loam
Soil pH
5-6.7
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 Northwest Arctic Borough
How your county's soil matches Fava Beans's growing requirements.
Soil pH
Your soil pH (5.0–6.7) is more acidic than Fava Beans prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
The silt loam soil in Northwest Arctic Borough is excellent for Fava Beans — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Fava Beans.
Organic Matter
Organic matter is excellent (6.7%) — Fava Beans will thrive.
How to Plant Fava Beans
Fall planting: Sow 12 weeks before your first frost date for a fall harvest.
Plant Water Budget
Monthly Watering Guide for Fava Beans
Fava Beans needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Fava Beans Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 2.1" | 0" | ❄️ Dormant |
| Feb | — | 1.6" | 0" | ❄️ Dormant |
| Mar | — | 1.7" | 0" | ❄️ Dormant |
| Apr | — | 1.4" | 0" | ❄️ Dormant |
| May | 4.3" | 2" | 2.3" | 🚿 Regular watering |
| Jun | 4.3" | 2.9" | 1.4" | 💧 Light watering |
| Jul | 4.3" | 6" | 0" | ✅ Rainfall sufficient |
| Aug | 4.3" | 6.1" | 0" | ✅ Rainfall sufficient |
| Sep | — | 8.6" | 0" | ❄️ Dormant |
| Oct | — | 4.7" | 0" | ❄️ Dormant |
| Nov | — | 3.1" | 0" | ❄️ Dormant |
| Dec | — | 2.5" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Aug in Northwest Arctic Borough). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Fava Beans 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.
Fava Beans Planting Timeline — Northwest Arctic Borough, AK
Fava Beans Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | April 6 | Apr 6 – Apr 20 |
| Transplant Outdoors | May 18 | May 18 – Jun 1 |
| Direct Sow | May 11 | May 11 – Jun 1 |
| Harvest | August 3 | Aug 3 – Sep 14 |
| Fall Sowing | May 14 | May 14 – May 28 |
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 | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1"/week · Natural rainfall sufficient
📅 Days to Maturity
75–100 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 2a
📆 Growing Season
80 days in Northwest Arctic Borough
Growing Tips for Fava Beans in Northwest Arctic Borough
Your 80.0-day growing season in Northwest Arctic Borough is tight for Fava Beans (75.0-100.0 days to maturity). Start indoors and choose early-maturing varieties.
Common pests for Fava Beans in this region include bean beetles and aphids. Use row covers early in the season and inspect plants weekly.
General growing tips
Direct sow as early as soil can be worked in spring. Pinch growing tips when pods begin to form to redirect energy and reduce aphid problems. Stake tall varieties.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Fava Beans in Other Locations
Frequently Asked Questions
When should I plant Fava Beans in Northwest Arctic Borough, AK?
Northwest Arctic Borough is in Zone 2a with an average last frost of May 18. Plan your Fava Beans planting based on this frost date — see the calendar above for exact timing.
What planting zone is Northwest Arctic Borough, AK?
Northwest Arctic Borough, Alaska is in USDA Hardiness Zone 2a. The average last spring frost is May 18 and first fall frost is August 6.
Your Northwest Arctic Borough Garden Planner — Free
A 24-page printable planner built for Northwest Arctic Borough (Zone 2a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.