(We will publish letters related to the leaf blower ban and referendum through July 22.) First, this is a summer-only restriction on commercial gas-powered leaf blowers. From Labor Day through Memorial Day, commercial landscapers may continue using gas-powered leaf blowers just as they always have. For only three months of the year—from Memorial Day through Labor Day—it limits the use of commercial gas-powered leaf blowers in residential neighborhoods. Commercial gas-powered leaf blowers are different.