Grasshoppers are an occasional pest in Iowa farms and gardens. The number of grasshoppers varies greatly from year to year and from place to place. This appears to be one of the years when at least some growers and gardeners are going to see more than the usual number.
The grasshoppers commonly found in Iowa spend the winter as eggs in the soil deposited in turfgrass or other sod areas by the female during the previous summer. Though some insect numbers were impacted by last summer's drought and last winter's deep and long-lasting frost that doesn't appear to be the case with grasshoppers in some areas.