When to Plant Pac Choi in Cochise County, AZ
May in Cochise County, Arizona — your action list
A quick May briefing for Cochise County, Arizona gardeners — what's urgent, what's next, and what can wait.
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Begin indoor sowing: pac choi
Bottom-water once the first true leaves appear — it keeps stems dry and knocks back damping-off.
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Collect pac choi at their peak
If you can't use it all right away, check the food-preservation section of your planner.
A few tasks this May that'll pay off in June
- First harvests: pac choi
Pac choi (baby bok choy) is a compact variety of Chinese cabbage with tender leaves and crisp stems. It grows quickly and is ideal for containers and small spaces.
Cochise County, Arizona is in USDA Zone 8b. The average last spring frost is March 30 and the first fall frost is November 9, giving you a growing season of approximately 224 days.
At an elevation of 3,447 feet, Cochise County receives approximately 9.4 inches of rainfall annually with predominantly sandy loam soil. Summer highs average 105°F, so Pac Choi may need afternoon shade and extra watering during peak heat. Sandy soil warms quickly in spring — great for early planting — but Pac Choi will need more frequent watering and organic matter to retain nutrients. With low rainfall, drip irrigation is essential for growing Pac Choi successfully. Mulch heavily to conserve soil moisture.
Cochise County Soil Profile
Soil Type
Sandy Loam
Soil pH
6.9-8.3
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 Cochise County
How your county's soil matches Pac Choi's growing requirements.
Soil pH
Your soil pH (6.9–8.3) is more alkaline than Pac Choi prefers (6.0–7.5). Add sulfur or peat moss to lower pH.
Soil Texture
Sandy soil in Cochise County warms quickly in spring but drains fast. Pac Choi will need more frequent watering and regular compost additions to retain nutrients.
Drainage
Pac Choi is a heavy drinker but your soil drains very quickly. Mulch heavily and consider drip irrigation.
Organic Matter
Organic matter is low (0.8%). Add 2-3 inches of compost before planting Pac Choi.
How to Plant Pac Choi
Fall planting: Sow 10 weeks before your first frost date for a fall harvest.
Succession Planting Pac Choi
Sow every 4.6 weeks. Last sowing by Sep 15 to harvest before frost.
For a dedicated fall crop, sow by Aug 31.
Plant Water Budget
Water stress score is 10/10 — consider drought-tolerant varieties and mulching
Monthly Watering Guide for Pac Choi
Pac Choi needs approximately 1.5 inches of water per week (6.5" per month). Here's how your county's rainfall compares month by month.
| Month | Pac Choi Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 0.6" | 0" | ❄️ Dormant |
| Feb | — | 0.5" | 0" | ❄️ Dormant |
| Mar | 6.5" | 0.5" | 6" | 🚿 Regular watering |
| Apr | 6.5" | 0.3" | 6.2" | 🚿 Regular watering |
| May | 6.5" | 0.2" | 6.3" | 🚿 Regular watering |
| Jun | 6.5" | 0.3" | 6.2" | 🚿 Regular watering |
| Jul | 6.5" | 1.6" | 4.9" | 🚿 Regular watering |
| Aug | 6.5" | 1.8" | 4.7" | 🚿 Regular watering |
| Sep | 6.5" | 1.4" | 5.1" | 🚿 Regular watering |
| Oct | 6.5" | 0.9" | 5.6" | 🚿 Regular watering |
| Nov | 6.5" | 0.5" | 6" | 🚿 Regular watering |
| Dec | — | 0.7" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Mar–Nov in Cochise County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Pac Choi 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.
Pac Choi Planting Timeline — Cochise County, AZ
Pac Choi Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | February 23 | Feb 23 – Mar 9 |
| Transplant Outdoors | March 30 | Mar 30 – Apr 13 |
| Direct Sow | March 16 | Mar 16 – Apr 6 |
| Harvest | May 11 | May 11 – Jun 8 |
| Fall Sowing | August 31 | Aug 31 – Sep 14 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | Start Indoors |
| March | Start Indoors Transplant Outdoors Direct Sow |
| April | Transplant Outdoors Direct Sow |
| May | Harvest |
| June | Harvest |
| July | — |
| August | Fall Sowing |
| September | Fall Sowing |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Partial Shade (3-6 hours)
💧 Water
1.5"/week · 2-3 times/week
📅 Days to Maturity
40–55 days
🧪 Soil pH
Needs 6–7.5 · Your soil: too_alkaline
🗺️ USDA Zone
Zone 8b
📆 Growing Season
224 days in Cochise County
Growing Tips for Pac Choi in Cochise County
Direct sow Pac Choi outdoors after March 30 in Cochise County when soil has warmed and frost danger has passed.
Sandy soil in Cochise County dries quickly — mulch Pac Choi with 2-3 inches of straw and water deeply 2-3 times per week rather than lightly every day.
With summer highs reaching 105°F in Cochise County, provide afternoon shade for Pac Choi and water deeply in the morning.
Your generous 224.0-day season in Cochise County allows multiple plantings of Pac Choi. Sow every 20.0 days for continuous harvest.
Common pests for Pac Choi 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 in spring or fall. Grows best in cool weather. Space 6 inches apart for baby pac choi. Harvest whole plants or cut outer leaves as needed.
Companion Planting
Good Companions
Avoid Planting Near
Check more plant combinations with our Companion Planting Checker →
Pac Choi in Other Locations
Frequently Asked Questions
When should I plant Pac Choi in Cochise County, AZ?
Cochise County is in Zone 8b with an average last frost of March 30. Plan your Pac Choi planting based on this frost date — see the calendar above for exact timing.
What planting zone is Cochise County, AZ?
Cochise County, Arizona is in USDA Hardiness Zone 8b. The average last spring frost is March 30 and first fall frost is November 9.
Your Cochise County Garden Planner — Free
A 24-page printable planner built for Cochise County (Zone 8b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.