As a gardener, I can tell you that the best time to plant a vegetable garden in Michigan depends on the specific vegetables you want to grow, as well as your local climate and frost dates. Generally, you can start planting cool-season vegetables, such as peas, lettuce, spinach, and radishes, as early as late March to mid-April, depending on the last frost date in your area. These vegetables can tolerate cooler temperatures and even light frost. For warm-season vegetables like tomatoes, peppers, cucumbers, and zucchini, wait until the danger of frost has passed, usually around late May to early June. These plants require warmer temperatures and can be damaged by frost. It's essential to consult a local planting calendar or your region's cooperative extension office to determine the most accurate planting times for your specific location in Michigan. Keep in mind that the state's weather can be quite variable, so always be prepared to protect your plants from unexpected frost or cold snaps.