The National Arboretum’s cherry blossoms and magnolia flowers are putting on a beautiful spring show across the grounds. The Arboretum is home to a high diversity of flowering cherry trees that have varying bloom times. While the National Park Service predicts the Yoshino Cherry trees in the Tidal Basin will reach peak bloom between March 22 to 25, peak bloom at the Arboretum could last longer depending on how the weather cooperates.