When to Plant Tomatillo in Swain County, NC
What to do in May
Your Swain County, North Carolina 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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Time to transplant tomatillo
Your last frost (April 24) has passed. These warm-season crops can handle outdoor soil now.
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Outdoor sowing time: tomatillo
Succession planting is the secret here. Put in a row now, another in 2 weeks, a third in 4.
June prep starts now
- Starting indoors: tomatillo
Tomatillos are a Mexican staple that produces tart, green fruits enclosed in papery husks. They are essential for salsa verde and green sauces.
Swain County, North Carolina is in USDA Zone 7a. The average last spring frost is April 24 and the first fall frost is October 17, giving you a growing season of approximately 176 days.
At an elevation of 2,612 feet, Swain County receives approximately 47.6 inches of rainfall annually with predominantly clay loam soil. Summer highs average 86°F, providing good warmth for Tomatillo during the growing season. Clay soil retains moisture well for Tomatillo, but amend with compost to improve drainage and prevent root rot.
Swain County Soil Profile
Soil Type
Clay Loam
Soil pH
5.4-6.7
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 Swain County
How your county's soil matches Tomatillo's growing requirements.
Soil pH
Your soil pH (5.4–6.7) overlaps with Tomatillo's range (6.0–7.0), though not a perfect match.
Soil Texture
The clay loam soil in Swain County is excellent for Tomatillo — good drainage, moisture retention, and nutrient holding capacity.
Drainage
Drainage is adequate for Tomatillo.
Organic Matter
Organic matter is moderate (2.9%). Annual compost additions will help Tomatillo.
How to Plant Tomatillo
Succession Planting Tomatillo
Sow every 6.9 weeks. Last sowing by Jul 24 to harvest before frost.
Plant Water Budget
Water stress score is 6/10 — consider drought-tolerant varieties and mulching
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 | — | 3.8" | 0" | ❄️ Dormant |
| Feb | — | 3.9" | 0" | ❄️ Dormant |
| Mar | — | 4.7" | 0" | ❄️ Dormant |
| Apr | 4.8" | 4" | 0.8" | 💧 Light watering |
| May | 4.8" | 4.3" | 0.5" | 💧 Light watering |
| Jun | 4.8" | 4.7" | 0.1" | 💧 Light watering |
| Jul | 4.8" | 4.8" | 0" | ✅ Rainfall sufficient |
| Aug | 4.8" | 3.9" | 0.9" | 💧 Light watering |
| Sep | 4.8" | 3.1" | 1.7" | 💧 Light watering |
| Oct | 4.8" | 2.9" | 1.9" | 💧 Light watering |
| Nov | — | 3.5" | 0" | ❄️ Dormant |
| Dec | — | 3.9" | 0" | ❄️ Dormant |
Water needs are for active growing months only (Apr–Oct in Swain 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 — Swain County, NC
Tomatillo Planting Calendar
| Activity | When | Date Range |
|---|---|---|
| Start Indoors | March 6 | Mar 6 – Mar 20 |
| Transplant Outdoors | May 8 | May 8 – May 22 |
| Direct Sow | May 1 | May 1 – May 22 |
| Harvest | July 10 | Jul 10 – Sep 18 |
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 | — |
| July | Harvest |
| August | Harvest |
| September | Harvest |
| October | — |
| November | — |
| December | — |
Growing Conditions
☀️ Sun
Full Sun (6-8+ hours)
💧 Water
1.1"/week · Natural rainfall sufficient
📅 Days to Maturity
60–85 days
🧪 Soil pH
Needs 6–7 · Your soil: acceptable
🗺️ USDA Zone
Zone 7a
📆 Growing Season
176 days in Swain County
Growing Tips for Tomatillo in Swain County
Direct sow Tomatillo outdoors after April 24 in Swain County when soil has warmed and frost danger has passed.
With Swain County's clay soil (31% clay), work in 3-4 inches of compost before planting Tomatillo. Avoid tilling when soil is wet to prevent compaction.
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 Swain County, NC?
Swain County is in Zone 7a with an average last frost of April 24. Plan your Tomatillo planting based on this frost date — see the calendar above for exact timing.
What planting zone is Swain County, NC?
Swain County, North Carolina is in USDA Hardiness Zone 7a. The average last spring frost is April 24 and first fall frost is October 17.
Your Swain County Garden Planner — Free
A 24-page printable planner built for Swain County (Zone 7a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.