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When to Plant Pac Choi in Ida County, IA

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.

Ida County, Iowa is in USDA Zone 4b. The average last spring frost is April 25 and the first fall frost is October 8, giving you a growing season of approximately 166 days.

At an elevation of 920 feet, Ida County receives approximately 38.9 inches of rainfall annually with predominantly silt loam soil. Summer highs average 80ยฐF, so choose short-season varieties of Pac Choi to ensure they mature before fall.

Ida County, IA (Zone 4b) Moderate season
166 days
Last Spring Frost April 25
166 growing days
First Fall Frost October 8

Ida County Soil Profile

Soil Type

Silt Loam

Soil pH

6.1-6.9

Drainage

Well Drained

Plant Planting Risk Windows

Early Start (70% safe) ✓ Fits season (95 days to spare)
Start indoors: Mar 10 Transplant: Apr 21 🍅 Harvest: Jun 2 – Jun 30
Recommended (50%) ✓ Fits season (96 days to spare)
Start indoors: Mar 14 Transplant: Apr 25 🍅 Harvest: Jun 6 – Jul 4
Safe Start (90%) ✓ Fits season (94 days to spare)
Start indoors: Mar 29 Transplant: May 10 🍅 Harvest: Jun 21 – Jul 19

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.

Plant Water Budget

Plant needs
1.5″/week
Rainfall provides
1.0″/week
You supply
0.5″/week
Watering frequency 1-2 times/week
Season total 762 gal / 100 sq ft
Pac Choi needs ~475 GDD — county provides 1,660 GDD Excellent fit

Pac Choi Planting Timeline โ€” Ida County, IA

Pac Choi Planting Calendar

Activity When Date Range
Start Indoors March 14 Mar 14 โ€“ Mar 28
Transplant Outdoors April 25 Apr 25 โ€“ May 9
Direct Sow April 18 Apr 18 โ€“ May 9
Fall Sowing July 16 Jul 16 โ€“ Jul 30
Harvest June 6 Jun 6 โ€“ Jul 4

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

Month-by-Month Timeline

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

Growing Conditions

Sun

Partial Shade (3-6 hours)

Water

High โ€” keep soil consistently moist

Days to Maturity

40โ€“55 days

Soil pH

6 โ€“ 7.5

USDA Zone

Zone 4b

Growing Season

166 days

Growing Tips for Ida County

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

  • Strawberries

Level Up Your Garden

Frequently Asked Questions

When should I plant Pac Choi in Ida County, IA?

Ida County is in Zone 4b with an average last frost of April 25. Plan your Pac Choi planting based on this frost date โ€” see the calendar above for exact timing.

What planting zone is Ida County, IA?

Ida County, Iowa is in USDA Hardiness Zone 4b. The average last spring frost is April 25 and first fall frost is October 8.

๐ŸŒฑ

Plan Your Garden with Confidence

Get our free Garden Planner โ€” designed to help Ida County gardeners in Zone 4b organize planting dates, track what's growing, and never miss a planting window.

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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 Ida County, IA. Local conditions may vary. Last updated: April 2026.