When to Plant Tomatillo in Kingsbury County, SD
What to do in May
Your Kingsbury County, South Dakota garden is entering a new phase. Here's what's on the schedule for May and why each task matters now.
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Plant out tomatillo
Frost risk is low now in Kingsbury County, South Dakota. If you've been covering beds overnight, you can stop.
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Plant tomatillo from seed, right in the garden
Your soil is 56°F — warm enough for these to germinate without babying.
Tomatillos are a Mexican staple that produces tart, green fruits enclosed in papery husks. They are essential for salsa verde and green sauces.
Kingsbury County, South Dakota is in USDA Zone 4b. The average last spring frost is May 7 and the first fall frost is October 5, giving you a growing season of approximately 151 days.
At an elevation of 958 feet, Kingsbury County receives approximately 27.7 inches of rainfall annually with predominantly loam soil. Summer highs average 83°F, so choose short-season varieties of Tomatillo to ensure they mature before fall.
Kingsbury County Soil Profile
Soil Type
Loam
Soil pH
6.7-7.2
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 Kingsbury County
How your county's soil matches Tomatillo's growing requirements.
Soil pH
Your soil pH (6.7–7.2) overlaps with Tomatillo's range (6.0–7.0), though not a perfect match.
Soil Texture
The loam soil in Kingsbury County is excellent for Tomatillo — good drainage, moisture retention, and nutrient holding capacity.
Organic Matter
Organic matter is excellent (4.3%) — Tomatillo will thrive.
How to Plant Tomatillo
Succession Planting Tomatillo
Sow every 6.9 weeks. Last sowing by Jul 12 to harvest before frost.
Plant Water Budget
Monthly Watering Guide for Tomatillo
Tomatillo needs approximately 1.1 inches of water per week (4.8" per month). Here's how your county's rainfall compares month by month.
| Month | Tomatillo Needs | Rainfall | You Supplement | Action |
|---|---|---|---|---|
| Jan | — | 0.7" | 0" | ❄️ Dormant |
| Feb | — | 1" | 0" | ❄️ Dormant |
| Mar | — | 1.5" | 0" | ❄️ Dormant |
| Apr | — | 3" | 0" | ❄️ Dormant |
| May | 4.8" | 4.3" | 0.5" | 💧 Light watering |
| Jun | 4.8" | 4.4" | 0.4" | 💧 Light watering |
| Jul | 4.8" | 3.5" | 1.3" | 💧 Light watering |
| Aug | 4.8" | 3.3" | 1.5" | 💧 Light watering |
| Sep | 4.8" | 2.6" | 2.2" | 💧 Light watering |
| Oct | 4.8" | 1.9" | 2.9" | 🚿 Regular watering |
| Nov | — | 0.8" | 0" | ❄️ Dormant |
| Dec | — | 0.6" | 0" | ❄️ Dormant |
Water needs are for active growing months only (May–Oct in Kingsbury County). Supplement amounts are based on average rainfall — actual needs vary with temperature, soil, and mulching.
Tomatillo 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.
Tomatillo Planting Timeline — Kingsbury County, SD
Tomatillo Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 5 | Mar 5 – Mar 19 |
| Transplant Outdoors | May 28 | May 28 – Jun 11 |
| Direct Sow | May 21 | May 21 – Jun 11 |
| Harvest | July 30 | Jul 30 – Oct 8 |
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
1.1"/week · 1-2 times/week
📅 Days to Maturity
60–85 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 4b
📆 Growing Season
151 days in Kingsbury County
Growing Tips for Tomatillo in Kingsbury County
Direct sow Tomatillo outdoors after May 07 in Kingsbury County when soil has warmed and frost danger has passed.
Common pests for Tomatillo in this region include tomato hornworm and aphids. Use row covers early in the season and inspect plants weekly.
General growing tips
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
Check more plant combinations with our Companion Planting Checker →
Tomatillo in Other Locations
Frequently Asked Questions
When should I plant Tomatillo in Kingsbury County, SD?
Kingsbury County is in Zone 4b with an average last frost of May 7. Plan your Tomatillo planting based on this frost date — see the calendar above for exact timing.
What planting zone is Kingsbury County, SD?
Kingsbury County, South Dakota is in USDA Hardiness Zone 4b. The average last spring frost is May 7 and first fall frost is October 5.
Your Kingsbury County Garden Planner — Free
A 24-page printable planner built for Kingsbury County (Zone 4b). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.