When to Plant Komatsuna in Yukon-Koyukuk Census Area, AK
May to-do list for Yukon-Koyukuk Census Area, Alaska
Welcome to May in Zone 2a. These are the moves that will have the biggest impact on your growing season.
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Set out komatsuna seedlings
Harden off for 7 days — a little more sun each day — before planting. That's the difference between a seedling that thrives and one that stalls.
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Plant komatsuna from seed, right in the garden
Thin ruthlessly once seedlings are up. Crowded roots mean smaller crops from every plant.
Looking ahead to June
- Fall sowing: komatsuna
Komatsuna (Japanese mustard spinach) is a versatile Asian green with glossy, dark leaves and a mild, sweet flavor. It is extremely cold-hardy and heat-tolerant.
Yukon-Koyukuk Census Area, Alaska is in USDA Zone 2a. The average last spring frost is May 29 and the first fall frost is August 26, giving you a growing season of approximately 89 days.
At an elevation of 2,163 feet, Yukon-Koyukuk Census Area receives approximately 55.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 69°F, so choose short-season varieties of Komatsuna to ensure they mature before fall. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Komatsuna root diseases.
Yukon-Koyukuk Census Area Soil Profile
Soil Type
Silt Loam
Soil pH
5-6.5
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 Yukon-Koyukuk Census Area
How your county's soil matches Komatsuna's growing requirements.
Soil pH
Your soil pH (5.0–6.5) is more acidic than Komatsuna prefers (6.0–7.5). Add garden lime to raise pH.
Soil Texture
The silt loam soil in Yukon-Koyukuk Census Area is excellent for Komatsuna — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Komatsuna.
Organic Matter
Organic matter is excellent (5.8%) — Komatsuna will thrive.
How to Plant Komatsuna
Fall planting: Sow 12 weeks before your first frost date for a fall harvest.
Succession Planting Komatsuna
Sow every 4 weeks. Last sowing by Jul 07 to harvest before frost.
For a dedicated fall crop, sow by Jun 03.
Plant Water Budget
Monthly Watering Guide for Komatsuna
Komatsuna needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.
| Month | Komatsuna Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 2.8" | 0" | ❄️ Dormant |
| Feb | — | 2.2" | 0" | ❄️ Dormant |
| Mar | — | 2.4" | 0" | ❄️ Dormant |
| Apr | — | 1.8" | 0" | ❄️ Dormant |
| May | 4.3" | 2.4" | 1.9" | 💧 Light watering |
| Jun | 4.3" | 3.7" | 0.6" | 💧 Light watering |
| Jul | 4.3" | 6.8" | 0" | ✅ Rainfall sufficient |
| Aug | 4.3" | 7.8" | 0" | ✅ Rainfall sufficient |
| Sep | — | 9.3" | 0" | ❄️ Dormant |
| Oct | — | 8.2" | 0" | ❄️ Dormant |
| Nov | — | 4.3" | 0" | ❄️ Dormant |
| Dec | — | 4.1" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Aug in Yukon-Koyukuk Census Area). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Komatsuna 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.
Komatsuna Planting Timeline — Yukon-Koyukuk Census Area, AK
Komatsuna Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | April 17 | Apr 17 – May 1 |
| Transplant Outdoors | May 29 | May 29 – Jun 12 |
| Direct Sow | May 22 | May 22 – Jun 12 |
| Harvest | July 3 | Jul 3 – Aug 7 |
| Fall Sowing | June 3 | Jun 3 – Jun 17 |
Plant 0.5" deep · 6" apart · Rows 12" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | Start Indoors |
| May | Start Indoors Transplant Outdoors Direct Sow |
| June | Transplant Outdoors Direct Sow Fall Sowing |
| July | Harvest |
| August | Harvest |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
1"/week · Natural rainfall sufficient
📅 Days to Maturity
35–50 days
🧪 Soil pH
Needs 6–7.5 · Your soil: too_acidic
🗺️ USDA Zone
Zone 2a
📆 Growing Season
89 days in Yukon-Koyukuk Census Area
Growing Tips for Komatsuna in Yukon-Koyukuk Census Area
Direct sow Komatsuna outdoors after May 29 in Yukon-Koyukuk Census Area when soil has warmed and frost danger has passed.
Common pests for Komatsuna 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 spring or fall. One of the most forgiving Asian greens for all seasons. Harvest outer leaves or cut whole plants. Excellent for stir-fries, soups, or salads.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Komatsuna in Other Locations
Frequently Asked Questions
When should I plant Komatsuna in Yukon-Koyukuk Census Area, AK?
Yukon-Koyukuk Census Area is in Zone 2a with an average last frost of May 29. Plan your Komatsuna planting based on this frost date — see the calendar above for exact timing.
What planting zone is Yukon-Koyukuk Census Area, AK?
Yukon-Koyukuk Census Area, Alaska is in USDA Hardiness Zone 2a. The average last spring frost is May 29 and first fall frost is August 26.
Your Yukon-Koyukuk Census Area Garden Planner — Free
A 24-page printable planner built for Yukon-Koyukuk Census Area (Zone 2a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.