As Southeast Iowa continues to deal with dangerous summer heat, experts say the hot weather is taking a toll on more than just people—it’s also putting stress on gardens, landscapes, and farm fields.
According to Iowa State University Extension, most plants begin to slow their growth once temperatures climb above 86 degrees.
Vegetable gardens are often among the first to show signs of heat stress. Crops like lettuce and spinach may bolt, while tomatoes and peppers can drop blossoms or delay producing fruit during extended periods of hot weather
Gardeners are encouraged to check soil moisture often and water early in the morning to reduce evaporation. Newly planted trees, shrubs, and flowers, along with container plants and hanging baskets, need extra attention because they dry out much more quickly. In fact, plants in containers may need watering twice a day during extreme heat.
Adding a layer of organic mulch can help conserve moisture and keep roots cooler.
Extension specialists also remind gardeners to take care of themselves by working during the cooler parts of the day, drinking plenty of water, and taking frequent breaks while working outdoors.