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When to Plant New Zealand Spinach in Gila County, AZ

Gila County, Arizona Zone 9a May

Gila County, Arizona gardeners: here's your May plan

May is a pivotal month for Gila County, Arizona gardens. Focus on these tasks first and you'll set up the rest of the season for success.

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. Pick new zealand spinach

    This is the payoff month. Bring a basket, bring a friend, and get into the beds.

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New Zealand spinach is a heat-tolerant ground-cover plant with thick, triangular leaves that taste similar to true spinach. It thrives in hot weather when regular spinach bolts.

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 New Zealand Spinach during the growing season. Sandy soil warms quickly in spring — great for early planting — but New Zealand Spinach will need more frequent watering and organic matter to retain nutrients. With low rainfall, drip irrigation is essential for growing New Zealand Spinach 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 (206 days to spare)
Start indoors: Dec 23 Transplant: Feb 10 🍅 Harvest: Apr 7 – May 5
Recommended (50%) ✓ Fits season (204 days to spare)
Start indoors: Jan 2 Transplant: Feb 20 🍅 Harvest: Apr 17 – May 15
Safe Start (90%) ✓ Fits season (185 days to spare)
Start indoors: Feb 10 Transplant: Mar 31 🍅 Harvest: May 26 – Jun 23

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 New Zealand Spinach's growing requirements.

Soil pH

Your soil pH (6.7–8.4) is more alkaline than New Zealand Spinach prefers (6.0–7.5). Add sulfur or peat moss to lower pH.

Soil Texture

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

Drainage

Drainage is adequate for New Zealand Spinach.

Organic Matter

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

How to Plant New Zealand Spinach

0.5"
Planting Depth
6"
Between Plants
12"
Between Rows

Succession Planting New Zealand Spinach

6
successive plantings in your 295-day season

Sow every 6.3 weeks. Last sowing by Sep 26 to harvest before frost.

Plant Water Budget

Plant needs
1.0″/week
Rainfall provides
0.1″/week
You supply
1.4″/week
Watering frequency 2-3 times/week
Season total 3,693 gal / 100 sq ft
Drought risk

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

Monthly Watering Guide for New Zealand Spinach

New Zealand Spinach needs approximately 1 inches of water per week (4.3" per month). Here's how your county's rainfall compares month by month.

Month New Zealand Spinach Needs Rainfall You Supplement Action
Jan 0.6" 0" ❄️ Dormant
Feb 4.3" 0.6" 3.7" 🚿 Regular watering
Mar 4.3" 0.5" 3.8" 🚿 Regular watering
Apr 4.3" 0.3" 4" 🚿 Regular watering
May 4.3" 0.2" 4.1" 🚿 Regular watering
Jun 4.3" 0.3" 4" 🚿 Regular watering
Jul 4.3" 1.5" 2.8" 🚿 Regular watering
Aug 4.3" 1.8" 2.5" 🚿 Regular watering
Sep 4.3" 1.5" 2.8" 🚿 Regular watering
Oct 4.3" 0.9" 3.4" 🚿 Regular watering
Nov 4.3" 0.5" 3.8" 🚿 Regular watering
Dec 4.3" 0.7" 3.6" 🚿 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.

New Zealand Spinach 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.

New Zealand Spinach needs ~1,281 GDD — county provides 6,068 GDD Excellent fit

New Zealand Spinach Planting Timeline — Gila County, AZ

New Zealand Spinach Planting Calendar

Activity When Date Range
Start Indoors January 2 Jan 2 – Jan 16
Transplant Outdoors February 20 Feb 20 – Mar 6
Direct Sow February 13 Feb 13 – Mar 6
Harvest April 17 Apr 17 – May 15

Plant 0.5" deep · 6" apart · Rows 12" apart

Month-by-Month Timeline

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

Growing Conditions

☀️ Sun

Full Sun (6-8+ hours)

💧 Water

1"/week · 2-3 times/week

📅 Days to Maturity

55–70 days

🧪 Soil pH

Needs 6–7.5 · Your soil: too_alkaline

🗺️ USDA Zone

Zone 9a

📆 Growing Season

295 days in Gila County

Growing Tips for New Zealand Spinach in Gila County

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

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

Gila County receives only 9" of rain annually. New Zealand Spinach needs consistent moisture — install drip irrigation or water deeply 2-3 times per week.

General growing tips

Soak seeds overnight before planting. Direct sow after last frost. Pinch growing tips regularly to encourage bushy growth and tender new leaves.

Companion Planting

Good Companions

Check more plant combinations with our Companion Planting Checker →

Frequently Asked Questions

When should I plant New Zealand Spinach in Gila County, AZ?

Gila County is in Zone 9a with an average last frost of February 13. Plan your New Zealand Spinach 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.