Plants for the Fall Blooming Garden Here's a quick overview of fall-blooming perennials that are hardy in our Northern Minnesota zone. Plan now for fall color! Aster (Michaelmas Daisy) Asters are the respected standby for all fall-blooming gardens. They are most familiar in purple shades but also bloom white, pink, and blue. Their fine-petaled flowers are between half an inch and two inches across. Asters begin to bloom in August and continue until frost. Pinch the tops in ea