When to Plant in Duluth, MN

Duluth, Minnesota, experiences a median last spring frost on May 15 and a median first fall frost on September 30, resulting in approximately 138 frost-free days. This limited growing season requires gardeners to plan their planting wisely to maximize crop yield within this timeframe. It is essential for both new and seasoned gardeners to understand their local climate and the specific timings of seasonal transitions to ensure that their plants thrive.

The microclimate of Duluth is classified as humid continental Great Plains, characterized by cold winters and warm summers. This climate benefits crops like tomatoes, sweet corn, and peppers, which flourish during the warmer months. However, crops such as melons and tender herbs like basil often struggle due to the shortened growing season and potential for late frosts. The conditions necessitate careful selection and timing for planting to take advantage of the frost-free days.

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