You typically plant tomatillos outdoors in April or May, after the danger of the last frost has passed in your specific growing region. The exact month depends on your USDA Hardiness Zone.
Optimal Planting Times for Tomatillos
Tomatillos, like their close relatives tomatoes, are warm-season plants that thrive once temperatures are consistently warm and all risk of frost is gone. Planting too early can expose young seedlings to damaging cold.
The following table provides general guidance for planting tomatillo seedlings or transplants outdoors based on common USDA Hardiness Zones:
| USDA Hardiness Zone | Approximate Planting Date (After Last Frost) |
|---|---|
| Zone 4b | On or around May 15 |
| Zone 5a | On or around April 15 |
| Zone 5b | On or around April 15 |
| Zone 6a | On or around April 15 |
Key Considerations Before Planting
- Last Frost Date: Always verify the average last frost date for your specific location. This is the most crucial factor in determining when it's safe to plant tomatillos outdoors.
- Soil Temperature: Tomatillos prefer warm soil. Aim for a soil temperature of at least 60°F (15°C) for optimal growth. You can warm the soil by covering it with black plastic a few weeks before planting.
- Sunlight: Choose a location that receives full sun, ideally 6-8 hours of direct sunlight per day.
- Transplants vs. Seeds: While you can start tomatillo seeds indoors 6-8 weeks before your last frost date, most gardeners plant pre-grown seedlings or transplants directly into the garden in April or May.
By planting tomatillos at the appropriate time for your zone and ensuring warm conditions, you set them up for a successful growing season and a bountiful harvest.
