The University of Minnesota Extension released advice on April 14 for gardeners in the state, emphasizing the importance of timing when planting seeds and seedlings due to unpredictable spring weather.
Gardeners in Minnesota face challenges such as late frosts, wide temperature swings, and a short growing season. The Extension said that relying on soil temperature, air temperature, and crop type is more effective than following the calendar alone. According to the organization, southern parts of Minnesota can typically plant one to two weeks earlier than northern regions because soils warm faster there. Raised beds and black plastic can also help speed up soil warming in spring.
The Extension advised patience for best results: “In Minnesota, successful gardening isn’t about planting early; it’s about planting smart.” It noted that average last frost dates range from early May in southern areas to late May or early June in northern ones. Even after warm days in April, overnight freezes are common into May.
Soil temperature is a key factor for seed germination and root growth. The Extension recommended using a soil thermometer at four inches deep for accurate guidance. Early crops like peas, spinach, lettuce, radishes, carrots, beets, kale, Swiss chard, onions (from sets or transplants), and potatoes can be planted when soil temperatures reach 40-50°F—usually from late April to early May—since they tolerate cold conditions.
Moderately warm-season crops such as broccoli and cabbage should wait until soils are 55-60°F (mid- to late May), while heat-loving plants like tomatoes and peppers require at least 65°F soil with no frost risk—typically from late May onward. Planting these too soon may result in slow growth or poor yields.
University of Minnesota Extension contributes to public service by delivering research-driven strategies that help residents address issues and seize opportunities according to the official website. It operates within cooperative extension and land-grant education according to the official website and extends its services statewide through local offices in every county according to the official website. The organization focuses on developing evidence-based approaches with hands-on learning involving residents for community advancement according to the official website. It is supported by the U.S. Department of Agriculture’s National Institute of Food and Agriculture as part of the University of Minnesota according to the official website.
University of Minnesota Extension continues offering research-backed solutions through educational programs aimed at helping communities tackle challenges across Minnesota according to the official website.
