When to Plant Tomatillo in Chickasaw County, IA
Tomatillos are a Mexican staple that produces tart, green fruits enclosed in papery husks. They are essential for salsa verde and green sauces.
Chickasaw County, Iowa is in USDA Zone 4b. The average last spring frost is May 3 and the first fall frost is October 5, giving you a growing season of approximately 155 days.
At an elevation of 1,139 feet, Chickasaw County receives approximately 37.8 inches of rainfall annually with predominantly silt loam soil. Summer highs average 81°F, so choose short-season varieties of Tomatillo to ensure they mature before fall.
Chickasaw County Soil Profile
Soil Type
Silt Loam
Soil pH
6-6.8
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.
Plant Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
Tomatillo Planting Timeline — Chickasaw County, IA
Tomatillo Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 1 | Mar 1 – Mar 15 |
| Transplant Outdoors | May 24 | May 24 – Jun 7 |
| Direct Sow | May 17 | May 17 – Jun 7 |
| Harvest | July 26 | Jul 26 – Oct 4 |
Plant 1" deep · 15" apart · Rows 24" apart
Month-by-Month Timeline
| Month | Activities |
|---|---|
| January | — |
| February | — |
| March | Start Indoors |
| April | — |
| May | Transplant Outdoors Direct Sow |
| June | Transplant Outdoors Direct Sow |
| July | Harvest |
| August | Harvest |
| September | Harvest |
| October | Harvest |
| November | — |
| December | — |
Growing Conditions
Sun
Full Sun (6-8+ hours)
Water
Moderate — regular watering
Days to Maturity
60–85 days
Soil pH
6 – 7
USDA Zone
Zone 4b
Growing Season
155 days
Growing Tips for Chickasaw County
Start seeds indoors 6-8 weeks before last frost. Plant at least two plants for cross-pollination. Harvest when fruits fill the husk and it begins to split.
Companion Planting
Good Companions
Avoid Planting Near
Level Up Your Garden
Tomatillo in Other Locations
Frequently Asked Questions
When should I plant Tomatillo in Chickasaw County, IA?
Chickasaw County is in Zone 4b with an average last frost of May 3. Plan your Tomatillo planting based on this frost date — see the calendar above for exact timing.
What planting zone is Chickasaw County, IA?
Chickasaw County, Iowa is in USDA Hardiness Zone 4b. The average last spring frost is May 3 and first fall frost is October 5.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Chickasaw County gardeners in Zone 4b organize planting dates, track what's growing, and never miss a planting window.
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