When to Plant Radish in Yukon-Koyukuk Census Area, AK
Your May game plan for Yukon-Koyukuk Census Area, Alaska
May rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in Yukon-Koyukuk Census Area, Alaska.
-
Seed radish outdoors
These tolerate cool soil, so you're not gambling by sowing now.
Coming up in June — start thinking about
- First harvests: radish
- Fall sowing: radish
Radishes are one of the fastest-growing vegetables, with some varieties ready in under a month. They come in round, elongated, and large winter types.
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 Radish to ensure they mature before fall. Ample rainfall means less supplemental watering, but ensure good drainage to prevent Radish 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 Radish's growing requirements.
Soil pH
Your soil pH (5.0–6.5) is more acidic than Radish prefers (6.0–7.0). Add garden lime to raise pH.
Soil Texture
The silt loam soil in Yukon-Koyukuk Census Area is excellent for Radish — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Radish.
Organic Matter
Organic matter is excellent (5.8%) — Radish will thrive.
How to Plant Radish
Fall planting: Sow 12 weeks before your first frost date for a fall harvest.
Succession Planting Radish
Sow every 2.4 weeks. Last sowing by Jul 22 to harvest before frost.
For a dedicated fall crop, sow by Jun 03.
Plant Water Budget
Monthly Watering Guide for Radish
Radish needs approximately 0.5 inches of water per week (2.2" per month). Here's how your county's rainfall compares month by month.
| Month | Radish 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 | 2.2" | 2.4" | 0" | ✅ Rainfall sufficient |
| Jun | 2.2" | 3.7" | 0" | ✅ Rainfall sufficient |
| Jul | 2.2" | 6.8" | 0" | ✅ Rainfall sufficient |
| Aug | 2.2" | 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.
Radish 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.
Radish Planting Timeline — Yukon-Koyukuk Census Area, AK
Radish Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Direct Sow | May 22 | May 22 – Jun 12 |
| Harvest | June 19 | Jun 19 – Jul 10 |
| Fall Sowing | June 3 | Jun 3 – Jun 17 |
Plant 0.5" deep · 2" apart · Rows 6" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | — |
| April | — |
| May | Direct Sow |
| June | Direct Sow Fall Sowing Harvest |
| July | Harvest |
| August | — |
| September | — |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.5"/week · Natural rainfall sufficient
📅 Days to Maturity
22–35 days
🧪 Soil pH
Needs 6–7 · Your soil: too_acidic
🗺️ USDA Zone
Zone 2a
📆 Growing Season
89 days in Yukon-Koyukuk Census Area
Growing Tips for Radish in Yukon-Koyukuk Census Area
Direct sow Radish outdoors after May 29 in Yukon-Koyukuk Census Area when soil has warmed and frost danger has passed.
Your generous 89.0-day season in Yukon-Koyukuk Census Area allows multiple plantings of Radish. Sow every 11.0 days for continuous harvest.
Common pests for Radish in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.
With 56" of annual rainfall in Yukon-Koyukuk Census Area, ensure good drainage for Radish — excess moisture can promote root rot and fungal diseases.
General growing tips
Direct sow every 1-2 weeks for continuous harvest. Do not transplant. Harvest spring radishes promptly to prevent them from becoming pithy and hot.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Radish in Other Locations
Frequently Asked Questions
When should I plant Radish in Yukon-Koyukuk Census Area, AK?
Yukon-Koyukuk Census Area is in Zone 2a with an average last frost of May 29. Plan your Radish 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.