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When to Plant Leeks in Gila County, AZ

Gila County, Arizona Zone 9a May

Top priorities for Gila County, Arizona gardeners in May

We've pulled the most time-sensitive tasks for Gila County, Arizona this May and put them front and centre. Tackle them in order.

Avg. last frost February 13
Avg. first frost December 5
Soil temp (4") 58°F
Watering Critical
Pest pressure Moderate
Daylight 13.8 hrs
  1. Start harvesting leeks

    If you can't use it all right away, check the food-preservation section of your planner.

Coming up in June — start thinking about
  • First harvests: leeks

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Leeks are a mild, sweet allium that produces long white shanks. They are more refined than onions and are a key ingredient in soups, stews, and gratins.

Gila County, Arizona is in USDA Zone 9a. The average last spring frost is February 13 and the first fall frost is December 5, giving you a growing season of approximately 295 days.

At an elevation of 3,643 feet, Gila County receives approximately 9.3 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 94°F, providing good warmth for Leeks during the growing season. Sandy soil warms quickly in spring — great for early planting — but Leeks will need more frequent watering and organic matter to retain nutrients. With low rainfall, drip irrigation is essential for growing Leeks successfully. Mulch heavily to conserve soil moisture.

Gila County, AZ (Zone 9a) Year-round
295 days
Last Spring Frost February 13
295 growing days
First Fall Frost December 5

Gila County Soil Profile

Soil Type

Sandy Loam

Soil pH

6.7-8.4

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (129 days to spare)
Start indoors: Jan 6 Transplant: Feb 3 🍅 Harvest: May 5 – Jul 21
Recommended (50%) ✓ Fits season (127 days to spare)
Start indoors: Jan 16 Transplant: Feb 13 🍅 Harvest: May 15 – Jul 31
Safe Start (90%) ✓ Fits season (108 days to spare)
Start indoors: Feb 24 Transplant: Mar 24 🍅 Harvest: Jun 23 – Sep 8

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 Gila County

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

Soil pH

Your soil pH (6.7–8.4) is more alkaline than Leeks prefers (6.0–7.0). Add sulfur or peat moss to lower pH.

Soil Texture

Sandy soil in Gila County warms quickly in spring but drains fast. Leeks will need more frequent watering and regular compost additions to retain nutrients.

Drainage

Drainage is adequate for Leeks.

Organic Matter

Organic matter is low (0.9%). Add 2-3 inches of compost before planting Leeks.

How to Plant Leeks

1"
Planting Depth
15"
Between Plants
24"
Between Rows

Fall planting: Sow 8 weeks before your first frost date for a fall harvest.

Plant Water Budget

Plant needs
0.8″/week
Rainfall provides
0.1″/week
You supply
1.1″/week
Watering frequency 2-3 times/week
Season total 2,871 gal / 100 sq ft
Drought risk

Water stress score is 10/10 — consider drought-tolerant varieties and mulching

Monthly Watering Guide for Leeks

Leeks needs approximately 0.8 inches of water per week (3.5" per month). Here's how your county's rainfall compares month by month.

Month Leeks Needs Rainfall You Supplement Action
Jan 0.6" 0" ❄️ Dormant
Feb 3.5" 0.6" 2.9" 🚿 Regular watering
Mar 3.5" 0.5" 3" 🚿 Regular watering
Apr 3.5" 0.3" 3.2" 🚿 Regular watering
May 3.5" 0.2" 3.3" 🚿 Regular watering
Jun 3.5" 0.3" 3.2" 🚿 Regular watering
Jul 3.5" 1.5" 2" 🚿 Regular watering
Aug 3.5" 1.8" 1.7" 💧 Light watering
Sep 3.5" 1.5" 2" 🚿 Regular watering
Oct 3.5" 0.9" 2.6" 🚿 Regular watering
Nov 3.5" 0.5" 3" 🚿 Regular watering
Dec 3.5" 0.7" 2.8" 🚿 Regular watering

Water needs are for active growing months only (Feb–Dec in Gila County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.

Leeks 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.

Leeks needs ~2,460 GDD — county provides 6,068 GDD Excellent fit

Leeks Planting Timeline — Gila County, AZ

Leeks Planting Calendar

Activity When Date Range
Start Indoors January 16 Jan 16 – Jan 30
Transplant Outdoors February 13 Feb 13 – Feb 27
Direct Sow January 23 Jan 23 – Feb 13
Harvest May 15 May 15 – Jul 31
Fall Sowing October 10 Oct 10 – Oct 24

Plant 1" deep · 15" apart · Rows 24" apart

Month-by-Month Timeline

MonthActivities
January Start Indoors Direct Sow
February Transplant Outdoors Direct Sow
March
April
May Harvest
June Harvest
July Harvest
August
September
October Fall Sowing
November
December

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

0.8"/week · 2-3 times/week

📅 Days to Maturity

90–150 days

🧪 Soil pH

Needs 6–7 · Your soil: too_alkaline

🗺️ USDA Zone

Zone 9a

📆 Growing Season

295 days in Gila County

Growing Tips for Leeks in Gila County

Direct sow Leeks outdoors after February 13 in Gila County when soil has warmed and frost danger has passed.

Sandy soil in Gila County dries quickly — mulch Leeks with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.

Common pests for Leeks in this region include onion maggots and thrips. Use row covers early in the season and inspect plants weekly.

General growing tips

Start seeds indoors 10-12 weeks before last frost. Transplant into trenches and hill soil around stems as they grow to increase the white portion. Harvest as needed.

Companion Planting

Good Companions

Avoid Planting Near

  • Peas
  • Green Beans

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant Leeks in Gila County, AZ?

Gila County is in Zone 9a with an average last frost of February 13. Plan your Leeks planting based on this frost date — see the calendar above for exact timing.

What planting zone is Gila County, AZ?

Gila County, Arizona is in USDA Hardiness Zone 9a. The average last spring frost is February 13 and first fall frost is December 5.

🌱

Your Gila County Garden Planner — Free

A 24-page printable planner built for Gila County (Zone 9a). 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 Gila County, AZ. 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.