GRAND RAPIDS, Mich. — A sure sign that Spring is coming closer will return to West Michigan in less than a month. Frederik Meijer Gardens & Sculpture Park announced the annual Butterflies are Blooming exhibition will open for its 30th year on March 1. Considered the largest temporary display of tropical butterflies in the United States, thousands of fluttering wings will fill the Lena Meijer Tropical Conservatory for two months…