Southeast Fairbanks, AK — Planting Guide
Southeast Fairbanks is in USDA Zone 2a. The average last spring frost is June 6 and the first fall frost is August 17, giving you a growing season of approximately 72 days.
At an elevation of 1,414 ft, Southeast Fairbanks receives approximately 39.8 in of rainfall annually. Summer highs average 62°F with winter lows around -2°F. The predominant soil type is Silt Loam.
Based on 29 years of NOAA climate station data, the last frost date here varies by 27 days year to year — ranging from May 19 in warm years to June 15 in cold years. The growing season is trending longer by about 2.76 days per decade. Southeast Fairbanks scores 58/100 (Moderate) on the Microclimate Index.
🌡️ Zone
2a (-50°F to -45°F min)
❄️ Last Frost
June 6
🍂 First Frost
August 17
📅 Growing Season
72 days
⛰️ Elevation
1,414 ft
🌧️ Annual Rainfall
39.8 in
Monthly Watering Calendar
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 2 in | 6 days | — | None |
| Feb | 1.6 in | 5 days | — | None |
| Mar | 1.6 in | 4 days | — | None |
| Apr | 1.4 in | 5 days | — | None |
| May | 1.8 in | 6 days | 2.5 in | High |
| Jun | 3.5 in | 7 days | 0.8 in | Moderate |
| Jul | 5.1 in | 10 days | — | Low |
| Aug | 5.9 in | 11 days | — | Low |
| Sep | 6.6 in | 14 days | — | Low |
| Oct | 4.5 in | 9 days | — | None |
| Nov | 3.3 in | 7 days | — | None |
| Dec | 2.5 in | 7 days | — | None |
Annual total: 39.8 in. Gardens typically need ~1 inch of water per week during the growing season. Months marked "None" for extra water are outside the active growing season for your zone — most gardens are dormant and don't need irrigation during those months.
Southeast Fairbanks Soil Profile
Soil Type
Silt Loam
Soil pH
4.9-6.6
Drainage
Well Drained
Frost Risk Probability
Based on 29 years of NOAA weather station data from 2 stations
Beginners: Plant frost-sensitive crops (tomatoes, peppers, squash) after the "Safe" date on the left. Harvest or cover them before the "Protect by" date on the right. Hardy crops (lettuce, peas, kale) can go in the yellow transition zones.
How to read this table: "Conservative" means you're safe from frost 9 out of 10 years — best for beginners and frost-sensitive crops. "Average year" is the typical date. "Aggressive" means only 1 in 10 years is that warm — experienced gardeners with frost protection can try these dates.
| Planting Strategy | Last Spring Frost | First Fall Frost | Frost-Free Days |
|---|---|---|---|
| Conservative (safest) | Jun 15 | Sep 2 | 79 days |
| Cautious | Jun 11 | Aug 20 | 70 days |
| Average year | Jun 6 | Aug 17 | 72 days |
| Optimistic | May 31 | Aug 8 | 69 days |
| Aggressive (risky) | May 19 | Aug 3 | 76 days |
Not very — frost dates can vary by ±27 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Yes — growing seasons are getting longer here (about 2.8 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Southeast Fairbanks presents some gardening challenges. Choose adapted varieties and plan around frost dates.
Local Gardening Help in Southeast Fairbanks
Free expert help is closer than you think. Your county's cooperative extension office connects you with trained gardeners, soil testing labs, and local programs — all specific to Southeast Fairbanks's climate and soil.
County Extension Office
Southeast Fairbanks University of Alaska Fairbanks Cooperative Extension Extension Office
Phone: 907-474-5211
Visit Extension Office Website →
Extension offices are run by land-grant universities and funded by the USDA. Their advice is free, research-based, and tailored to your county's specific conditions.
Master Gardener Program
Free gardening help from trained volunteers
Master Gardeners are community volunteers who complete 40–60 hours of university horticultural training. They answer gardening questions, diagnose plant problems, and offer workshops — all free.
Many extension offices run a Master Gardener hotline where you can call or email with photos of plant problems for free diagnosis.
Soil Testing
Available through your extension office
Before amending your soil, get it tested. Your extension office offers soil testing (typically $10–$25) that tells you exact pH, nutrient levels, and amendment recommendations specific to what you want to grow.
Services Available in Southeast Fairbanks
Finding local nurseries & garden centers in Southeast Fairbanks
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Southeast Fairbanks's soil and climate that big-box stores can't. Plants from local growers are typically hardier because they're already acclimated to your zone.
How to Find Them
Search for "nurseries near Southeast Fairbanks AK" or "garden center Southeast Fairbanks" on Google Maps. Also check with your extension office — they often maintain lists of reputable local nurseries and plant sales.
Community gardens & gardening groups
Community gardens are a great way to learn from experienced gardeners in your area, especially if you're limited on space. Search "community garden Southeast Fairbanks AK" or check your extension office and local parks department. Facebook groups like "Southeast Fairbanks Gardeners" or "Alaska Gardening" are also excellent for local advice and plant swaps.
Sunlight & Day Length
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Longest Day
20.1 hours
Summer solstice daylight
Shortest Day
3.9 hours
Winter solstice daylight
Peak Sun Hours
9.9 hr/day peak (summer)
Peak sun hours (green dashed line below) account for cloud cover — this is the usable direct sunlight your garden actually receives. Most vegetables need 6+ peak sun hours.
Onion tip: Your long summer days (14+ hours) support long-day onion varieties like Walla Walla, Sweet Spanish, and Ailsa Craig.
View detailed monthly data
| Month | Daylight Hours | Peak Sun Hours | Day Length |
|---|---|---|---|
| January | 5.1 hr | 1.5 hr | Short day |
| February | 8.2 hr | 2.9 hr | Short day |
| March | 11.2 hr | 4.6 hr | Short day |
| April | 14.6 hr | 6.7 hr | Long day |
| May | 17.8 hr | 8.1 hr | Long day |
| June | 20.1 hr | 9.2 hr | Long day |
| July | 19.1 hr | 9.9 hr | Long day |
| August | 16 hr | 7.3 hr | Long day |
| September | 12.6 hr | 5.1 hr | Neutral |
| October | 9.3 hr | 3.4 hr | Short day |
| November | 6 hr | 1.8 hr | Short day |
| December | 3.9 hr | 0.9 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting Calendar
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from Jul through Aug.
Best Month to Compost
Jun
Microbial activity peaks when soil is warm.
Active Composting
4 months
Short season — insulate pile or use indoor vermicomposting.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 3°F | 14°F | ❄️ Dormant | ~36 weeks |
| Feb | 4°F | 12°F | ❄️ Dormant | ~36 weeks |
| Mar | 16°F | 17°F | ❄️ Dormant | ~36 weeks |
| Apr | 33°F | 30°F | ❄️ Dormant | ~36 weeks |
| May | 46°F | 43°F | 🐢 Slow | ~24 weeks |
| Jun | 59°F | 51°F | ♻️ Active | ~14 weeks |
| Jul | 65°F | 58°F | ♻️ Active | ~14 weeks |
| Aug | 64°F | 59°F | ♻️ Active | ~14 weeks |
| Sep | 56°F | 56°F | ♻️ Active | ~14 weeks |
| Oct | 41°F | 44°F | 🐢 Slow | ~24 weeks |
| Nov | 29°F | 33°F | ❄️ Dormant | ~36 weeks |
| Dec | 12°F | 23°F | ❄️ Dormant | ~36 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in Southeast Fairbanks
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Insect Pest Pressure
Low — basic prevention and occasional hand-picking.
Disease Risk
Moderate — watch for mildew and blight during wet periods.
Seasonal Risk
View 4 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | Low | Jun, Jul, Aug |
| Cabbage worms | Moderate | Jun, Jul, Aug |
| Flea beetles | Low | May, Jun, Jul |
| Slugs | Low | May, Jun, Jul, Aug |
Organic pest management tips
- Use row covers on susceptible crops during peak pest months
- Apply neem oil preventatively every 7-14 days during active pest season
- Interplant with strong-scented herbs (basil, marigold) to confuse pests
- Hand-pick larger pests (beetles, caterpillars) in early morning when they're sluggish
- Practice crop rotation — never plant the same family in the same spot within 3 years
Wind & Microclimate
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 11 mph Summer: 8 mph
Fall: 9 mph Winter: 13 mph
Prevailing wind: N. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
5.1/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Low
Relatively flat terrain (352 ft range). Frost pocket risk is minimal — garden placement is flexible.
Rainwater Harvesting Potential
How much water you can collect, when to collect it, and what size system you need for your garden.
Annual Collection
19,836 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
6 rain barrels (55 gal each)
For a typical 500 sq ft garden. Serious collectors: consider a 1,500 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
Jul, Aug, Sep, Oct
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Feb, Mar, Apr
Dry months when you'll rely on stored water — size your storage for this gap.
Rainwater collection tips for your area
- Your county receives approximately 39.8 inches of rain per year
- A 1,000 sq ft roof can collect roughly 19,836 gallons annually
- Rainwater harvesting is fully legal in your state
- Stock up on stored water before your dry season (Feb, Mar, Apr)
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in Southeast Fairbanks
Soil Type
Silt Loam
Soil pH 4.9–6.6 · Poorly Drained drainage
Raised beds strongly recommended here — native soil drainage or texture limits in-ground options.
Watering Needs
Drought stress: 1.5/10
Southeast Fairbanks has very low drought pressure. Natural rainfall usually meets garden needs — water only during extended dry spells.
Season Tips
72-day frost-free season
A short season means indoor starts are critical for warm-season crops. Prioritise cold-hardy, fast-maturing varieties and use row covers to extend autumn harvests.
Free Garden Planner
Plan your entire garden season — organize planting dates, track what you're growing, and know exactly when to start seeds, transplant, and harvest.
Recommended for Your Garden
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Get instant, accurate soil pH readings to fine-tune your amendments.
Boost soil fertility and structure with rich, well-aged organic compost.
🥬 Vegetables to Grow in Southeast Fairbanks
38 vegetables that grow well in Zone 2a with planting dates for Southeast Fairbanks.
Show all 38 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Amaranth | Apr 4 | Jun 20 | Jun 27 | Sep 26 – Nov 14 | 90–120 |
| Beets | — | May 30 | — | Jul 25 – Aug 22 | 50–70 |
| Bok Choy | Apr 25 | May 30 | Jun 6 | Jul 18 – Aug 22 | 40–60 |
| Broccoli | Apr 25 | May 30 | Jun 6 | Aug 8 – Sep 19 | 60–90 |
| Broccoli Rabe | Apr 25 | May 30 | Jun 6 | Jul 18 – Aug 22 | 40–60 |
| Brussels Sprouts | Apr 25 | May 30 | Jun 6 | Sep 5 – Oct 31 | 90–130 |
| Cabbage | Apr 25 | May 30 | Jun 6 | Aug 8 – Oct 3 | 60–100 |
| Cauliflower | Apr 25 | May 30 | Jun 6 | Aug 1 – Oct 3 | 55–100 |
| Celery | Apr 25 | May 30 | Jun 6 | Aug 29 – Oct 24 | 80–120 |
| Chard | Apr 25 | May 30 | Jun 6 | Aug 1 – Sep 19 | 50–60 |
| Chinese Cabbage | Apr 25 | May 30 | Jun 6 | Aug 1 – Aug 29 | 50–70 |
| Collard Greens | Apr 25 | May 30 | Jun 6 | Aug 1 – Oct 3 | 55–75 |
| Cress | Apr 25 | May 30 | Jun 6 | Jun 20 – Jul 11 | 14–21 |
| Daikon | — | May 30 | — | Jul 25 – Aug 22 | 50–70 |
| Fava Beans | Apr 25 | May 30 | Jun 6 | Aug 22 – Oct 3 | 75–100 |
| Kai Lan | Apr 25 | May 30 | Jun 6 | Jul 25 – Aug 22 | 45–60 |
| Kale | Apr 25 | May 30 | Jun 6 | Aug 1 – Sep 26 | 50–70 |
| Kohlrabi | Apr 25 | May 30 | Jun 6 | Jul 25 – Aug 29 | 45–65 |
| Komatsuna | Apr 25 | May 30 | Jun 6 | Jul 11 – Aug 15 | 35–50 |
| Lentils | Apr 25 | May 30 | Jun 6 | Aug 29 – Oct 10 | 80–110 |
| Lettuce | Apr 25 | May 30 | Jun 6 | Jul 11 – Sep 19 | 30–60 |
| Mache | Apr 25 | May 30 | Jun 6 | Jul 18 – Aug 22 | 40–60 |
| Microgreens | Apr 25 | May 30 | Jun 6 | Jun 13 – Jul 11 | 7–21 |
| Mustard Greens | Apr 25 | May 30 | Jun 6 | Jul 11 – Sep 12 | 30–50 |
| Napa Cabbage | Apr 25 | May 30 | Jun 6 | Aug 1 – Sep 5 | 55–75 |
| Pac Choi | Apr 25 | May 30 | Jun 6 | Jul 18 – Aug 15 | 40–55 |
| Parsnip | — | May 30 | — | Sep 12 – Oct 24 | 100–130 |
| Peas | Apr 25 | May 30 | Jun 6 | Aug 1 – Sep 26 | 55–70 |
| Purslane | Apr 25 | May 30 | Jun 6 | Jul 18 – Aug 22 | 40–60 |
| Radish | — | May 30 | — | Jun 27 – Jul 18 | 22–35 |
| Rutabaga | — | May 30 | — | Aug 22 – Sep 26 | 80–100 |
| Savoy Cabbage | Apr 25 | May 30 | Jun 6 | Aug 15 – Oct 10 | 70–110 |
| Snap Peas | Apr 4 | Jun 20 | Jun 27 | Aug 22 – Oct 17 | 55–70 |
| Snow Peas | Apr 25 | May 30 | Jun 6 | Aug 1 – Sep 26 | 50–65 |
| Spinach | Apr 25 | May 30 | Jun 6 | Jul 11 – Sep 12 | 35–50 |
| Sunflower | Apr 4 | Jun 20 | Jun 27 | Sep 5 – Oct 24 | 70–100 |
| Tatsoi | Apr 25 | May 30 | Jun 6 | Jul 11 – Aug 15 | 35–50 |
| Turnip | — | May 30 | — | Jul 11 – Aug 15 | 40–60 |
🍓 Fruits to Grow in Southeast Fairbanks
4 fruits that grow well in Zone 2a with planting dates for Southeast Fairbanks.
Show all 4 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Cranberries | — | — | Jul 4 | — | 730–1095 |
| Haskaps | — | — | Jul 4 | — | 730–1095 |
| Lingonberries | — | — | Jul 4 | — | 730–1095 |
| Serviceberries | — | — | Jul 4 | — | 730–1095 |
🌿 Herbs to Grow in Southeast Fairbanks
3 herbs that grow well in Zone 2a with planting dates for Southeast Fairbanks.
Monthly Planting Guide for Southeast Fairbanks
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Southeast Fairbanks.
Frequently Asked Questions
What planting zone is Southeast Fairbanks, AK?
Southeast Fairbanks is in USDA Hardiness Zone 2a. This zone classification determines which perennial plants survive winter and sets the baseline for frost timing across the county.
When is the last frost in Southeast Fairbanks, AK?
Based on 29 years of NOAA weather station data, the median last spring frost in Southeast Fairbanks falls around June 6. In 8 out of 10 years, last frost lands between May 19 and June 15 — a 27-day window of variability. Use June 15 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Southeast Fairbanks, AK?
The median first fall frost in Southeast Fairbanks arrives around August 17. In cold years it can arrive as early as August 3; in mild years as late as September 2. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Southeast Fairbanks?
Southeast Fairbanks has a frost-free growing season of approximately 72 days. Focus on short-season varieties and start warm-season crops indoors 6–8 weeks before last frost. Climate records show the growing season is trending longer by about 2.76 days per decade.
What is the soil like in Southeast Fairbanks for gardening?
Southeast Fairbanks has predominantly Silt Loam soil with a pH range of 4.9–6.6 and Poorly Drained drainage. The native soil conditions make raised beds a particularly good investment here — they let you control drainage and fertility independent of the ground soil.
What is grown commercially in Southeast Fairbanks?
Southeast Fairbanks has commercial agriculture that includes Hay, Cattle, Potatoes. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Southeast Fairbanks a good location for home gardening?
Southeast Fairbanks scores 58/100 (Moderate) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. Conditions here are moderate — most common crops grow well with standard timing and care.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Southeast Fairbanks gardeners in Zone 2a organize planting dates, track what's growing, and never miss a planting window.
Get Your Free Garden Planner →Free download. Plan your entire garden season in minutes.
