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When to Plant Turnip in Denali Borough, AK

Turnips are a fast-growing cool-season root vegetable with edible roots and greens. Baby turnips are sweet and tender while mature ones are more pungent.

Denali Borough, Alaska is in USDA Zone 2b. The average last spring frost is June 2 and the first fall frost is August 25, giving you a growing season of approximately 84 days.

At an elevation of 2,930 feet, Denali Borough receives approximately 15.5 inches of rainfall annually with predominantly silt loam soil. Summer highs average 70ยฐF, so choose short-season varieties of Turnip to ensure they mature before fall. With low rainfall, drip irrigation is essential for growing Turnip successfully. Mulch heavily to conserve soil moisture.

Denali Borough, AK (Zone 2b) Very short season
84 days
Last Spring Frost June 2
84 growing days
First Fall Frost August 25

Denali Borough Soil Profile

Soil Type

Silt Loam

Soil pH

5.2-6.6

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (5 days to spare)
Transplant: May 28 🍅 Harvest: Jul 9 – Aug 13
Recommended (50%) ✓ Fits season (7 days to spare)
Transplant: Jun 2 🍅 Harvest: Jul 14 – Aug 18
Safe Start (90%) ✗ May not fit
Transplant: Jun 21 🍅 Harvest: Aug 2 – Sep 6

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
0.8″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft
Turnip needs ~125 GDD — county provides 210 GDD Excellent fit

Turnip Planting Timeline โ€” Denali Borough, AK

Turnip Planting Calendar

Activity When Date Range
Direct Sow May 26 May 26 โ€“ Jun 16
Fall Sowing June 2 Jun 2 โ€“ Jun 16
Harvest July 7 Jul 7 โ€“ Aug 11

Plant 0.5" deep ยท 4" apart ยท Rows 12" apart

Month-by-Month Timeline

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

Growing Conditions

Sun

Full Sun (6-8+ hours)

Water

Moderate โ€” regular watering

Days to Maturity

40โ€“60 days

Soil pH

6 โ€“ 7

USDA Zone

Zone 2b

Growing Season

84 days

Growing Tips for Denali Borough

Direct sow in early spring or late summer. Harvest when roots are 2-3 inches in diameter for best flavor. Both the roots and the greens are nutritious and edible.

Companion Planting

Good Companions

Avoid Planting Near

  • Potatoes

Level Up Your Garden

Frequently Asked Questions

When should I plant Turnip in Denali Borough, AK?

Denali Borough is in Zone 2b with an average last frost of June 2. Plan your Turnip planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Denali Borough, AK?

Denali Borough, Alaska is in USDA Hardiness Zone 2b. The average last spring frost is June 2 and first fall frost is August 25.

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Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Denali Borough gardeners in Zone 2b 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 Denali Borough, AK. Local conditions may vary. Last updated: April 2026.