When to Plant Kale in La Paz County, AZ
May to-do list for La Paz County, Arizona
May is a pivotal month for La Paz County, Arizona gardens. Focus on these tasks first and you'll set up the rest of the season for success.
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It's harvest week for kale
Taste as you pick. The first ripe produce is the best feedback loop you'll get all season.
Kale is an exceptionally hardy, nutrient-dense green available in curly, lacinato, and Russian varieties. It tolerates heavy frost and often tastes sweeter after cold exposure.
La Paz County, Arizona is in USDA Zone 9a. The average last spring frost is February 2 and the first fall frost is December 6, giving you a growing season of approximately 307 days.
At an elevation of 4,875 feet, La Paz County receives approximately 17.4 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 105°F, so Kale may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Kale will need more frequent watering and organic matter to retain nutrients. With low rainfall, drip irrigation is essential for growing Kale successfully. Mulch heavily to conserve soil moisture.
La Paz County Soil Profile
Soil Type
Sandy Loam
Soil pH
7.2-8.3
Drainage
Well Drained
Plant Planting Risk Windows
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 La Paz County
How your county's soil matches Kale's growing requirements.
Soil pH
Your soil pH (7.2–8.3) is more alkaline than Kale prefers (6.0–7.5). Add sulfur or peat moss to lower pH.
Soil Texture
Sandy soil in La Paz County warms quickly in spring but drains fast. Kale will need more frequent watering and regular compost additions to retain nutrients.
Organic Matter
Organic matter is low (0.7%). Add 2-3 inches of compost before planting Kale.
How to Plant Kale
Fall planting: Sow 8 weeks before your first frost date for a fall harvest.
Succession Planting Kale
Sow every 5.7 weeks. Last sowing by Sep 27 to harvest before frost.
For a dedicated fall crop, sow by Oct 11.
Plant Water Budget
Water stress score is 10/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Kale
Kale 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 | Kale Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 1.3" | 0" | ❄️ Dormant |
| Feb | 3.5" | 0.9" | 2.6" | 🚿 Regular watering |
| Mar | 3.5" | 1" | 2.5" | 🚿 Regular watering |
| Apr | 3.5" | 0.6" | 2.9" | 🚿 Regular watering |
| May | 3.5" | 0.4" | 3.1" | 🚿 Regular watering |
| Jun | 3.5" | 0.7" | 2.8" | 🚿 Regular watering |
| Jul | 3.5" | 2.5" | 1" | 💧 Light watering |
| Aug | 3.5" | 3.7" | 0" | ✅ Rainfall sufficient |
| Sep | 3.5" | 2.5" | 1" | 💧 Light watering |
| Oct | 3.5" | 1.6" | 1.9" | 🚿 Regular watering |
| Nov | 3.5" | 1" | 2.5" | 🚿 Regular watering |
| Dec | 3.5" | 1.2" | 2.3" | 🚿 Regular watering |
Water needs are for active growing months only (Feb–Dec in La Paz County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Kale 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.
Kale Planting Timeline — La Paz County, AZ
Kale Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | January 5 | Jan 5 – Jan 19 |
| Transplant Outdoors | February 2 | Feb 2 – Feb 16 |
| Direct Sow | January 12 | Jan 12 – Feb 2 |
| Harvest | March 30 | Mar 30 – May 25 |
| Fall Sowing | October 11 | Oct 11 – Oct 25 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | Start Indoors Direct Sow |
| February | Transplant Outdoors Direct Sow |
| March | Harvest |
| April | Harvest |
| May | Harvest |
| June | — |
| July | — |
| August | — |
| September | — |
| October | Fall Sowing |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
0.8"/week · 1-2 times/week
📅 Days to Maturity
50–70 days
🧪 Soil pH
Needs 6–7.5 · Your soil: too_alkaline
🗺️ USDA Zone
Zone 9a
📆 Growing Season
307 days in La Paz County
Growing Tips for Kale in La Paz County
Direct sow Kale outdoors after February 02 in La Paz County when soil has warmed and frost danger has passed.
Sandy soil in La Paz County dries quickly — mulch Kale with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
Summer highs in La Paz County reach 105°F — grow Kale as a spring or fall crop. Use shade cloth if planting in summer.
Common pests for Kale in this region include cabbage worm and flea beetles. Use row covers early in the season and inspect plants weekly.
General growing tips
Direct sow or transplant in early spring or late summer. Harvest outer leaves first to keep plants productive. Kale overwinters in many climates and can provide greens all year.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Isolate 1/2 mile from other brassicas (broccoli, cabbage, etc.) — they all cross.
Kale in Other Locations
Frequently Asked Questions
When should I plant Kale in La Paz County, AZ?
La Paz County is in Zone 9a with an average last frost of February 2. Plan your Kale planting based on this frost date — see the calendar above for exact timing.
What planting zone is La Paz County, AZ?
La Paz County, Arizona is in USDA Hardiness Zone 9a. The average last spring frost is February 2 and first fall frost is December 6.
Your La Paz County Garden Planner — Free
A 24-page printable planner built for La Paz 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.