You are doing it wrong. Here’s the right time to plant popular herbs based on zone

Overview of USDA Plant Hardiness Zones
The USDA Plant Hardiness Zone Map is the standard by which gardeners and growers can determine which plants are most likely to thrive at a location. The map divides North America into 13 zones, each defined by a 10-degree Fahrenheit difference in the average annual minimum temperature. Zone 1 is the coldest, while Zone 13 is the warmest. This system helps gardeners understand the climatic conditions of their area and choose plants accordingly. Each zone is further divided into ‘a’ and ‘b’ subzones, offering even more precision for planting decisions.
Top 12 Popular Herbs and Their Ideal Planting Times
Some of the most popular herbs include basil, mint, rosemary, thyme, oregano, parsley, cilantro, chives, dill, sage, lavender, and tarragon. Each of these herbs has specific planting times based on the zone. For example, basil, which is sensitive to cold, should be planted after the last frost in zones 4-10. Rosemary, a more hardy herb, can be planted earlier in warmer zones. Understanding the ideal planting times for these herbs in your specific zone will help ensure a bountiful harvest.
Zone 3: Planting Guidelines for Cold Climates
Zone 3 is characterized by cold winters with minimum temperatures ranging from -40 to -30 degrees Fahrenheit. In this zone, the growing season is short, so it’s important to start herbs indoors or use cold frames to extend the season. Herbs like chives, mint, and parsley can be started indoors in late winter and transplanted outside after the last frost. Hardy herbs such as thyme and sage can also thrive in this zone if given a head start indoors.
Zone 4: Best Planting Practices for Cooler Regions
Zone 4 experiences minimum temperatures between -30 and -20 degrees Fahrenheit. The growing season is slightly longer than in Zone 3, but starting seeds indoors is still recommended. Herbs like dill, cilantro, and parsley can be sown directly into the ground after the last frost. Perennial herbs such as oregano and thyme can be planted early in the season to establish strong roots before the winter.