When to Plant Mustard Greens in Southeast Fairbanks, AK
Top priorities for Southeast Fairbanks, Alaska gardeners in May
A quick May briefing for Southeast Fairbanks, Alaska gardeners — what's urgent, what's next, and what can wait.
-
Plant mustard greens from seed, right in the garden
Keep the top inch of soil moist until germination — a gentle morning watering for 5–7 days does the job.
-
Sow mustard greens for an autumn harvest
Count back from your first frost (August 17) — these need to mature before the cold arrives.
Before June arrives, get these ready
- Transplants going out: mustard greens
Mustard greens are fast-growing brassicas with a spicy, peppery kick. They come in green, red, and purple varieties and are excellent cooked or in salads.
Southeast Fairbanks, Alaska 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 feet, Southeast Fairbanks receives approximately 39.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 62°F, so choose short-season varieties of Mustard Greens to ensure they mature before fall.
Southeast Fairbanks Soil Profile
Soil Type
Silt Loam
Soil pH
4.9-6.6
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 Southeast Fairbanks
How your county's soil matches Mustard Greens's growing requirements.
Soil pH
Your soil pH (4.9–6.6) is more acidic than Mustard Greens prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
The silt loam soil in Southeast Fairbanks is excellent for Mustard Greens — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Mustard Greens.
Organic Matter
Organic matter is excellent (6.3%) — Mustard Greens will thrive.
How to Plant Mustard Greens
Fall planting: Sow 12 weeks before your first frost date for a fall harvest.
Succession Planting Mustard Greens
Sow every 3.4 weeks. Last sowing by Jun 28 to harvest before frost.
For a dedicated fall crop, sow by May 25.
Plant Water Budget
Monthly Watering Guide for Mustard Greens
Mustard Greens needs approximately 0.7 inches of water per week (3" per month). Here's how your county's rainfall compares month by month.
| Month | Mustard Greens Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 2" | 0" | ❄️ Dormant |
| Feb | — | 1.6" | 0" | ❄️ Dormant |
| Mar | — | 1.6" | 0" | ❄️ Dormant |
| Apr | — | 1.4" | 0" | ❄️ Dormant |
| May | — | 1.8" | 0" | ❄️ Dormant |
| Jun | 3" | 3.5" | 0" | ✅ Rainfall sufficient |
| Jul | 3" | 5.1" | 0" | ✅ Rainfall sufficient |
| Aug | 3" | 5.9" | 0" | ✅ Rainfall sufficient |
| Sep | — | 6.6" | 0" | ❄️ Dormant |
| Oct | — | 4.5" | 0" | ❄️ Dormant |
| Nov | — | 3.3" | 0" | ❄️ Dormant |
| Dec | — | 2.5" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Jun–Aug in Southeast Fairbanks). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Mustard Greens 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.
Mustard Greens Planting Timeline — Southeast Fairbanks, AK
Mustard Greens Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | April 25 | Apr 25 – May 9 |
| Transplant Outdoors | June 6 | Jun 6 – Jun 20 |
| Direct Sow | May 30 | May 30 – Jun 20 |
| Harvest | July 11 | Jul 11 – Sep 12 |
| Fall Sowing | May 25 | May 25 – Jun 8 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Start Indoors |
| May | Start Indoors Direct Sow Fall Sowing |
| June | Transplant Outdoors Direct Sow Fall Sowing |
| July | Harvest |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
0.7"/week · Natural rainfall sufficient
📅 Days to Maturity
30–50 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 2a
📆 Growing Season
72 days in Southeast Fairbanks
Growing Tips for Mustard Greens in Southeast Fairbanks
Direct sow Mustard Greens outdoors after June 06 in Southeast Fairbanks when soil has warmed and frost danger has passed.
Common pests for Mustard Greens in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.
General growing tips
Direct sow in early spring or fall. Harvest young leaves for milder flavor. Plants bolt quickly in heat so grow as a cool-season crop or provide shade.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Mustard Greens in Other Locations
Frequently Asked Questions
When should I plant Mustard Greens in Southeast Fairbanks, AK?
Southeast Fairbanks is in Zone 2a with an average last frost of June 6. Plan your Mustard Greens planting based on this frost date — see the calendar above for exact timing.
What planting zone is Southeast Fairbanks, AK?
Southeast Fairbanks, Alaska is in USDA Hardiness Zone 2a. The average last spring frost is June 6 and first fall frost is August 17.
Your Southeast Fairbanks Garden Planner — Free
A 24-page printable planner built for Southeast Fairbanks (Zone 2a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.