We started putting in the swales in the middle of April so they’ve had a bit of time to mature with clover as well as a variety of edibles ranging from perennial berries to rhubarb to annuals such as kale and cow peas. As luck would have it our muscovy ducklings hatched  just days after the swales filled for the first time. They wasted no time and began swimming in the swales on their first day.