The state of Iowa (US) has a program to plant native species in the ditches and medians of state highways. Heard about it on the radio a year or so ago. Explain

The state of Iowa (US) has a program to plant native species in the ditches and medians of state highways. Heard about it on the radio a year or so ago. Explains why the ditches are always so pretty to look at. https://iowadot.gov/lrtf/integrated-roadside-vegetation-management/why-it-matters https://iowadot.gov/lrtf/integrated-roadside-vegetation-mana...