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When to Plant Radish in Prince of Wales-Hyder, AK

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.

Prince of Wales-Hyder, Alaska is in USDA Zone 7b. The average last spring frost is April 13 and the first fall frost is November 1, giving you a growing season of approximately 202 days.

At an elevation of 257 feet, Prince of Wales-Hyder receives approximately 14.4 inches of rainfall annually with predominantly silt loam soil. Summer highs average 70ยฐF, so choose short-season varieties of Radish to ensure they mature before fall. With low rainfall, drip irrigation is essential for growing Radish successfully. Mulch heavily to conserve soil moisture.

Prince of Wales-Hyder, AK (Zone 7b) Long season
202 days
Last Spring Frost April 13
202 growing days
First Fall Frost November 1

Prince of Wales-Hyder Soil Profile

Soil Type

Silt Loam

Soil pH

5.2-6.8

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (151 days to spare)
Transplant: Apr 10 🍅 Harvest: May 8 – May 29
Recommended (50%) ✓ Fits season (153 days to spare)
Transplant: Apr 13 🍅 Harvest: May 11 – Jun 1
Safe Start (90%) ✓ Fits season (163 days to spare)
Transplant: May 1 🍅 Harvest: May 29 – Jun 19

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.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.3″/week
You supply
0.4″/week
Watering frequency 1-2 times/week
Season total 720 gal / 100 sq ft
Radish needs ~71 GDD — county provides 505 GDD Excellent fit

Radish Planting Timeline โ€” Prince of Wales-Hyder, AK

Radish Planting Calendar

Activity When Date Range
Direct Sow March 30 Mar 30 โ€“ Apr 20
Fall Sowing August 23 Aug 23 โ€“ Sep 6
Harvest April 27 Apr 27 โ€“ May 18

Plant 0.5" deep ยท 2" apart ยท Rows 6" apart

Month-by-Month Timeline

MonthActivities
January โ€”
February โ€”
March Direct Sow
April Direct Sow Harvest
May Harvest
June โ€”
July โ€”
August Fall Sowing
September Fall Sowing
October โ€”
November โ€”
December โ€”

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

22โ€“35 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 7b

Growing Season

202 days

Growing Tips for Prince of Wales-Hyder

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

  • Hyssop

Level Up Your Garden

Frequently Asked Questions

When should I plant Radish in Prince of Wales-Hyder, AK?

Prince of Wales-Hyder is in Zone 7b with an average last frost of April 13. Plan your Radish planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Prince of Wales-Hyder, AK?

Prince of Wales-Hyder, Alaska is in USDA Hardiness Zone 7b. The average last spring frost is April 13 and first fall frost is November 1.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Prince of Wales-Hyder gardeners in Zone 7b organize planting dates, track what's growing, and never miss a planting window.

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Data sources: USDA Plant Hardiness Zone Map (2023), NOAA 30-Year Climate Normals. Frost dates are based on 50% probability averages for Prince of Wales-Hyder, AK. Local conditions may vary. Last updated: April 2026.