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When to Plant Dill in Denali Borough, AK

Denali Borough, Alaska Zone 2a May

What to do in May

May rewards gardeners who work with the weather, not against it. Here's how to stay in step this month in Denali Borough, Alaska.

Avg. last frost June 2
Avg. first frost August 25
Soil temp (4") 41°F
Watering Critical
Pest pressure Low
Daylight 17.8 hrs
  1. Get dill in the ground

    Water the tray well an hour before you transplant. Roots slide out cleanly and settle in faster.

  2. Scatter dill into prepared beds

    Sow every 2 weeks for a continuous harvest. A single big planting means a single big glut.

Coming up in June — start thinking about
  • Fall sowing: dill

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Dill is a feathery annual herb with aromatic leaves and seeds. Its fine foliage and umbrella-shaped flower heads attract beneficial insects to the garden.

Denali Borough, Alaska is in USDA Zone 2a. 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 70°F, so choose short-season varieties of Dill to ensure they mature before fall. With low rainfall, drip irrigation is essential for growing Dill successfully. Mulch heavily to conserve soil moisture.

Denali Borough, AK (Zone 2a) Very short season
84 days
Last Spring Frost June 2
84 growing days
First Fall Frost August 25
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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) ✗ May not fit
Start indoors: Apr 16 Transplant: May 21 🍅 Harvest: Jul 2 – Sep 3
Recommended (50%) ✗ May not fit
Start indoors: Apr 21 Transplant: May 26 🍅 Harvest: Jul 7 – Sep 8
Safe Start (90%) ✗ May not fit
Start indoors: May 10 Transplant: Jun 14 🍅 Harvest: Jul 26 – Sep 27

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 Denali Borough

How your county's soil matches Dill's growing requirements.

Soil pH

Your soil pH (5.2–6.6) overlaps with Dill's range (5.5–7.0), though not a perfect match.

Soil Texture

The silt loam soil in Denali Borough is excellent for Dill — good drainage, moisture retention, and nutrient holding capacity.

Drainage

Drainage is adequate for Dill.

Organic Matter

Organic matter is excellent (6.0%) — Dill will thrive.

How to Plant Dill

0.5"
Planting Depth
8"
Between Plants
12"
Between Rows

Fall planting: Sow 12 weeks before your first frost date for a fall harvest.

Succession Planting Dill

2
successive plantings in your 84-day season

Sow every 4.6 weeks. Last sowing by Jun 26 to harvest before frost.

For a dedicated fall crop, sow by Jun 02.

Plant Water Budget

Plant needs
0.5″/week
Rainfall provides
0.8″/week
Watering frequency Natural rainfall sufficient
Season total 0 gal / 100 sq ft

Monthly Watering Guide for Dill

Dill 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 Dill Needs Rainfall You Supplement Action
Jan 0.8" 0" ❄️ Dormant
Feb 0.6" 0" ❄️ Dormant
Mar 0.6" 0" ❄️ Dormant
Apr 0.5" 0" ❄️ Dormant
May 0.7" 0" ❄️ Dormant
Jun 2.2" 1.3" 0.9" 💧 Light watering
Jul 2.2" 1.7" 0.5" 💧 Light watering
Aug 2.2" 2.7" 0" ✅ Rainfall sufficient
Sep 2.8" 0" ❄️ Dormant
Oct 2" 0" ❄️ Dormant
Nov 1" 0" ❄️ Dormant
Dec 0.9" 0" ❄️ Dormant

Water needs are for active growing months only (Jun–Aug in Denali Borough). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Dill 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.

Dill needs ~125 GDD — county provides 210 GDD Excellent fit

Dill Planting Timeline — Denali Borough, AK

Dill Planting Calendar

Activity When Date Range
Start Indoors April 21 Apr 21 – May 5
Transplant Outdoors May 26 May 26 – Jun 9
Direct Sow May 26 May 26 – Jun 16
Harvest July 7 Jul 7 – Sep 8
Fall Sowing June 2 Jun 2 – Jun 16

Plant 0.5" deep · 8" apart · Rows 12" apart

Month-by-Month Timeline

MonthActivities
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 Harvest
October
November
December
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Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.5"/week · Natural rainfall sufficient

📅 Days to Maturity

40–60 days

🧪 Soil pH

Needs 5.5–7 · Your soil: acceptable

🗺️ USDA Zone

Zone 2a

📆 Growing Season

84 days in Denali Borough

Growing Tips for Dill in Denali Borough

Direct sow Dill outdoors after June 02 in Denali Borough when soil has warmed and frost danger has passed.

Common pests for Dill in this region include carrot rust fly and parsleyworm. Use row covers early in the season and inspect plants weekly.

General growing tips

Direct sow in spring as dill has a taproot and dislikes transplanting. Succession sow for continuous leaf harvest. Allow some plants to flower for seeds and to attract beneficial insects.

Companion Planting

Good Companions

Avoid Planting Near

  • Carrots
  • Tomatoes

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Dill in Denali Borough, AK?

Denali Borough is in Zone 2a with an average last frost of June 2. Plan your Dill planting based on this frost date — see the calendar above for exact timing.

What planting zone is Denali Borough, AK?

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

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Your Denali Borough Garden Planner — Free

A 24-page printable planner built for Denali Borough (Zone 2a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.

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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: May 2026.

Sources & credits

Every number on this page traces back to a primary horticulture or government data source. Click through to verify.